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Directions: For each of the following questions, all major steps must be shown to receive full credit. Formulas and Mass Calculations Level 1 Multiple Choice 1. The formula for magnesium nitrate is 1) Mg(NO3)2; 2) Mg2NO3 ; 3) MgNO3 ; 4) Mg2(NO3)3. ANS: 1 2. The formula of the oxide of titanium is Ti02. The formula of the corresponding fluoride is 1) TiF; 2) TiF2; 3) Ti2F; 4) Ti2F3; 5) TiF4. ANS: 5 3. The correct formula for magnesium phosphate is 1) Mg(PO4)2; 2) MgPO4; 3) Mg3(PO4)2; 4) Mg2(PO4)3; 5) none of these. ANS: 3 4. The correct formula for magnesium hydroxide is 1) MgOH; 2) MgOH2; 3) Mg2OH; 4) 2MgOH; 5) Mg(OH)2. ANS: 5 5. Iron(II) chloride has the formula 1) FeC1; 2) FeCl2; 3) 2FeC1; 4) FeC14; 5) Fe2C1. ANS: 2 6. What is the formula of chromium (III) sulfide? 1) CrS3 2) Cr2S3 3) Cr3S2 4) Cr3S 5) Cr3S3 ANS: 2 7. What is the formula for the compound aluminum sulfate? 1) AlSO4 2) A12SO4 3) A13SO4 4) Al3(SO4)2 5) A12(SO4)3 ANS: 5 8. The formula for nickel chloride is l) NiCl; 2) Ni2Cl; 3) 2NiCl; 4) NiCl2; 5) none of these. ANS: 4 9. The formula of ferrous oxide is FeO. The formula of ferric oxide is 1) FeO2; 2) Fe2O; 3) Fe2O3; 4) FeO3; 5) none of these. ANS: 3 10. The formula of stannic oxide is SnO2. The valence of Sn is 1) +1; 2) +2; 3) +3; 4) +4; 5) -2. ANS: 4 11. Which is the formula of a compound? 1) C 2) Cl2 3) N2 4) HF 5) none of these ANS: 4 12. “M” represents a metallic element, the oxide of which has the formula M2O. The formula of the chloride of M is 1) MCl; 2) MC12; 3) MC13; 4) MC14. ANS: 1 13. If the valence of oxygen is -2, the valence of titanium in the formula TiO2 is 1) +2; 2) –2; 3) +4; 4) -4. ANS: 3 14. Acetylene, C2H2, and benzene, C6H6, have the same empirical (simplest) formula, C1H1. The molecular formulas could be found by determining 1) the mole ratios; 2) the combining ratios; 3) the molecular masses; 4) the heats of formation. ANS: 3 15. Which is the correct name for Fe2(SO4)3 ? 1) Iron (II) sulfate 2) iron (III) sulfate 3) iron (IV) sulfate 4) iron(II) sulfite 5) iron(III) sulfite ANS: 2 16. The correct formula for barium hydroxide is 1) BaOH; 2) BaOH2; 3) Ba(OH)2; 4) Ba2OH; 5) Ba3(OH)2. ANS: 3 17. When writing a chemical formula, the element with a positive valence 1) is written last; 2) needs no subscript; 3) is written first; 4) is placed in parentheses. ANS: 3 18. The formula CuSO11. represents 1) hydrated cupric sulfate; 2) blue crystalline cupric sulfate; 3) the anhydride of cupric sulfate; 4) anhydrous cupric sulfate. ANS: 4 19. What is the formula for chromium (III) oxide? 1) CrO 2) Cr2O 3) Cr3O 4) Cr2O3 5) Cr3O2 ANS: 4 20. The formula of an oxide of tin is SnO2. The formula of the corresponding chloride is 1) SnC1; 2) SnCl2; 3) Sn2C1; 4) SnC13; 5) SnC14. ANS: 5 21. Silver hydrogen phosphate has the formula Ag2HPO4. What is the formula for ferric hydrogen phosphate? 1) Fe2HPO4 3) Fe2(HPO4)3 2) Fe3(HPO4)2 4) Fe(HPO4)3 5) Fe(HPO4)2 ANS: 3 22. Barium hypochlorite has the formula Ba(ClO)2. Determine the formula for chromic hypochlorite. 1) CrC1O 2) Cr(ClO)3 3) Cr2(ClO)3 4) Cr3(ClO)2 5) Cr(ClO)2 ANS: 2 23. A molecule of a binary compound must 1) consist of two atoms; 2) contain a metal and a nonmetal; 3) result from electron transfer; 4) contain only two elements. ANS: 4 24. The formula of a binary compound is 1) NH4OH; 2) P4O10; 3) Pb(NO3)2; 4) CaCO3. ANS: 2 25. Which formula is not correct? 1) A12(SO4)3 2) BaHCO3 3) Ca(OH)2 4) NH4HSO4 5) LiH ANS: 2 26. How many atoms are in one molecule of ammonium dichromate? 1) 14 2) 15 3) 19 4) 23 5) none of these ANS: 3 27. How many atoms are in one molecule of chromic hydrogen carbonate? 1) 6 2) 11 3) 14 4) 16 5) none of these ANS: 4 28. One molecule of barium phosphate contains how many atoms? 1) 6 2) 11 3) 13 4) 17 5) none of these ANS: 3 29. The total number of atoms of oxygen represented in Na2B4O7.10 H2O is l) 7; 2) 10; 3) 17; 4) 20; 5) 27. ANS: 3 30. The number of atoms of nitrogen represented in one molecule of ammonium nitrate is 1) 1; 2) 2; 3) 3; 4) 4; 5) none of these. ANS: 2 31. The total number of atoms of oxygen represented in the expression 3 H2SO4 is 1) 1; 2) 7; 3) 3; 4) 4; 5) 12. ANS: 5 32. One molecule of potassium nitrate has how many atoms? 1) 5 2) 6 3) 7 4) 9 5) none of these ANS: 1 33. The total number of atoms of oxygen represented in the formula ZnSO4•7H2O is 1) 18; 2) 14; 3) 11; 4) 4; 5) 5. ANS: 3 34. The number of atoms of hydrogen in the expression “3 H2SO4” is 1) 2; 2) 3; 3) 4; 4) 6. ANS: 4 35. How many atoms are in one molecule of chromic acetate? 1) 8 2) 15 3) 17 4) 19 5) 22 ANS: 5 36. The total number of atoms represented by the formula (NH4)2Cr2O7 is 1) 11; 2) 18; 3) 19; 4) 23. ANS: 3 37. How many atoms are in one molecule of ferric chlorate? 1) 5 2) 7 3) 9 4) 13 5) 14 ANS: 4 38. Find the number of atoms in one molecule of ammonium sulfate. 1) 8 2) 10 3) 15 4) 20 5) 25 ANS: 3 39. The total number of oxygen atoms represented in the formula Co(NO3)2.6H2O is 1) 3; 2) 6; 3) 9; 4) 12; 5) 13. ANS: 4 40. The total number of atoms of oxygen present in the formula aluminum sulfate is 1) 6; 2) 9; 3) 12; 4) 17; 5) 24. ANS: 3 41. The formula for chromic sulfate has how many atoms in one molecule? 1) 5 2) 9 3) 10 4) 15 5) 17 ANS: 5 42. The number of atoms represented in the formula Co(NO3)2.6H2O is 1) 4; 2) 9; 3) 18; 4) 21; 5) 27. ANS: 5 43. The total number of atoms in the formula aluminum acetate is 1) 9; 2) 10; 3) 13; 4) 15; 5) 22. ANS: 5 44. The number of atoms in one molecule of iron (III) sulfate is 1) 6; 2) 8; 3 ) 13; 4) 17; 5) none of these. ANS: 4 45. How many atoms are in three molecules of acetone, CH3COCH3 ? 1) 3 2) 9 3) 15 4) 18 5) 30 ANS: 5 46. The formula mass of aluminum sulfate is 1) 123 grams; 2) 214 grams; 3) 278 grams; 4) 342 grams. ANS: 4 47. Find the molecular mass of zinc nitrate. 1) 127 2) 189 3) 192 4) 261 5) 304 ANS: 2 48. The molecular mass of trinitrotoluene, C7H5(NO2) is 1) 135; 2) 199; 3) 227; 4) 315; 5) 329. ANS: 3 49. The molecular weight of Mg(NO3)2 is approximately 1) 86; 2) 134; 3) 148; 4) 172; 5) 181. ANS: 3 50. Any given mass of oxygen and hydrogen which have the same number of atoms are in the ratio of 1) 1:2; 2) 2:1; 3) 1:8; 4) 16:1; 5) 3:1. ANS: 4 51. The heaviest of the following gases is 1) CH4; 2) N2O; 3) NO2; 4) SO2. ANS: 4 52. Which is the lightest of the following gases? 1) NO 2) CH4 3) SO2 4) CO ANS: 2 53. The formula mass of carbon dioxide is 1) 12; 2) 28; 3) 32; 4) 40; 5) 44. ANS: 4 54. Find the molecular mass of calcium phosphate. 1) 127 2) 135 3) 365 4) 403 5) none of these ANS: 5 55. If the atomic mass scale were revised to assign carbon the value 3.0, what value would be assigned to sulfur? 1) 96 2) 56 3) 32 4) 8.0 5) 4.0 ANS: 4 56. What is the percentage of water (by mass) in Hg2SO4•3H2O? 1) 3.3% 2) 4.2% 3) 9.8% 4) 15.4% 5) 30.8% ANS: 3 57. The compound which contains 60% oxygen by weight is 1) CO; 2) CO2; 3) Na2O2; 4) SO3; 5) none of these. ANS: 4 58. Calculate the percent of nitrogen in ammonium nitrite, NH4NO2. 1) 22.0% 2) 33.0% 3) 44.0% 4) 52.0%; 5) none of these ANS: 3 59. What is the percentage of water (by mass) in A1PO4.2H2O? 1) 14.1% 2) 22.8% 3) 25.3% 4) 29.5% ANS: 2 60. In the formula Na2CO3.10 H2O, the element which makes up the largest percentage by mass is 1) Na; 2) C; 3) H; 4) O. ANS: 4 61. What is the mass percentage of sulfur in sulfur dioxide, SO2? 1) 16% 2) 32% 3) 33% 4) 50% 5) 66% ANS: 4 62. Which expression gives the percentage by mass of oxygen in water, H2O? 1) (1/8) x 100 3) (16.0/18.0) x 100 2) (2/3) x 100 4) (18.0/16.0) x 100 5) (1/9) x 100 ANS: 3 63. Find the percent of hydrogen in ferric hydroxide. 1) 2.2 % 2) 2.8 % 3) 4.0 % 4) 6.7 % ANS: 2 64. The compound which contains 50% of each element by mass is 1) CO; 2) CO2; 3) Na2O2; 4) CuO2; 5) SO2. ANS: 5 65. Calculate the percent of water (by mass) found in Na2CO3.3H2O. 1) 17.2% 2) 22.2% 3) 33.8% 4) 50.9% ANS: 3 66. What is the percent of phosphorus in calcium phosphate? 1) 20.0 % 2) 22.9 % 3) 27.7 % 4) 32.3 % ANS: 1 67. Find the percentage of water (by mass) in Ca(C1O3)2.H2O. 1) 7.9% 2) 12.7% 3) 14.8% 4) 18.1% ANS: 1 68. What is the percentage of titanium by mass in titanium tetrachloride, TiCl4? 1) 18.7% 2) 20.0% 3) 25.2% 4) 34.8% ANS: 3 69. Which of these compounds contains the greatest percent by mass of nitrogen? 1) NO 2) NO2 3) N2O4 4) N2O 5) HNO3 ANS: 4 70. In the formula Ca(HCO3)2 the element which makes up the largest percentage by mass is 1) Ca; 2) H; 3) C; 4) O; 5) Ca and C are equal. ANS: 4 71. The compound with the highest percentage by mass of nitrogen is 1) NH4C1; 2) (NH4)2SO4; 3) NH3; 4) NH4NO3. ANS: 3 72. Any given masses of oxygen and sulfur which have the same number of atoms are in the ratio of l) 1:2; 2) 2:1; 3) 16:1; 4) 1:32. ANS: 1 73. The percentage of carbon in sodium hydrogen carbonate is 1) 14.3%; 2) 27.4%; 3) 57.2%; 4) 61.4%; 5) 83.3%. ANS: 1 74. Find the percentage of oxygen in chromic oxide. 1) 31.6% 2) 15.8% 3) 42.3% 4) 6.71% 5) 56.2% ANS: 1 75. What is the percentage by mass of magnesium in magnesium nitride, Mg3N2 ? 1) 100 % 2) 72 % 3) 60 % 4) 28% 5) 13% ANS: 2 76. A 6.3 gram sample of a hydrate was heated until the water of hydration was driven off. The anhydrous compound had a mass of 4.8 grams. What was the percent of water (by mass) in the hydrate? 1) 23.8% 2) 31.3% 3) 39.4% 4) 76.2% 5) 107.1% ANS: 1 77. A 60 gram sample of LiCl.H2O is heated in an open crucible until all of the water has been driven off. What is the total mass of LiCl remaining in the crucible? 1) 18 grams 2) 24 grams 3) 42 grams 4) 60 grams ANS: 3 78. If 13.1 grams of a hydrate were completely heated, all the water of hydration can be driven off. If the anhydrous sample weighed 11.8 grams, what was the percent of water in the hydrate? 1) 1.3% 2) 9.9% 3) 11.0% 4) 90.1% ANS: 2 79. When 27.6 grams of a hydrate were completely heated, the anhydrous sample had a mass of 16.3 grams. What was the percent of water in the hydrate? 1) 69.3% 2) 59.1% 3) 40.9% 4) 11.3% ANS: 3 80. A 4.4 gram sample of a hydrate was heated until the water of hydration was driven off. The anhydrous compound had a mass of 3.3 grams. What is the percentage by mass of water in the hydrate? 1) 25% 2) 33% 3) 67% 4) 75% ANS: 1 81. A 9.7 gram sample of a hydrate was heated until the water of hydration was driven off. The anhydrous sample had a mass of 7.2 grams. What was the percent of water in the hydrate? 1) 25.8% 2) 34.7% 3) 74.2% 4) 134.7% ANS: 1 82. In an experiment, a student found that the percent of oxygen in a sample of KC1O3 was 41.3%. If the accepted value is 39.3%, the experimental percent error is 1) [(41.3 – 39.3)/39.3] x 100; 2) [39.3/41.3] x 100; 3) [2/41.3] x 100; 4) [41.3/39.3] x 100. ANS: 1 83. An ion is an atom or group of atoms which is 1) electrically neutral; 2) electrostatically charged; 3) always negative; 4) always positive. ANS: 2 84. The symbol Ag+ represents one 1) atom of argon; 2) ion of argon; 3) atom of silver; 4) ion of silver; 5) none of these. ANS: 4 85. The symbol Fe+3 represents 1) three ions of iron; 2) one ion of lead; 3) one atom of iron; 4) one ion of fluorine; 5) none of these. ANS: 5 86. Sulfate, SO4-2, is 1) an acid; 2) a compound; 3) a radical; 4) a salt. ANS: 3 87. The chlorine atom and the chloride ion have the same 1) nuclear charge; 2) number of electrons; 3) chemical properties; 4) oxidizing ability. ANS: 1 88. A Bunsen burner that is not properly adjusted produces a flame that is orange-yellow in color and is sooty. The probable cause of this condition is that 1) no oxygen is mixing with the gas. 3) insufficient oxygen is mixing with the gas. 2) no gas is mixing with the oxygen. 4) insufficient gas is mixing with the oxygen. ANS: 3 89. The hottest part of the Bunsen flame is located at 1) the tip of the outer cone; 2) just above the tip of the inner cone; 3) in the reducing flame; 4) inside the inner cone; 5) above the tip of the outer cone. ANS: 2 90. The hottest part of a Bunsen flame is 1) just above the outer cone; 2) at the top of the outer cone; 3) in the inner cone; 4) just above the inner cone. ANS: 4 91. Heating a crystal of blue copper sulfate yields 1) a basic anhydride; 2) a hydrate; 3) sulfur; 4) a white powder; 5) blue fumes. ANS: 4 92. The process that produces an anhydrous substance can be reversed by: 1) taking out water; 2) adding water; 3) heating the substance; 4) none of the above. ANS: 2 93. Water of hydration is driven off from a crystal by 1) dissolving the crystal; 2) heating the crystal; 3) adding an acid; 4) filtration. ANS: 2 94. A formula representing a hydrate is 1) H2O2; 2) BaCl2•2H2O; 3) NaOH; 4) H2SO4. ANS: 2 95. A chemical balance is calibrated to measure 1) cubic centimeters; 2) liters; 3) millimeters; 4) ounces; 5) grams. ANS: 5 X—Ą˘ßä&'…¤Źťňóôőö6=?@Y^_bcdežđń 67€‚ƒ“”˘ŁŚ§¨ŠŞ¸˝žÁÂĂÄĹŃ;<MNz{ĐŃ    " # a z  €  œ Ą ˘ Ł ž Ă Ä ŕ á ü÷üü÷üüüőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőőH* 5>*\5\aX—w„…¤Źź˝ćgnoÁ9@AýîîîîîáÜáááĐÄľľŁŁľ Ć>cĺ$1$7$8$H$ ĆĚd˙1$7$8$H$ Ć 1$7$8$H$ ĆĚ1$7$8$H$ Ć€ ĆĚŔ!1$7$8$H$ Ć ̀Ŕ!1$7$8$H$”PţAtăęë}…‰Ž $ % W ä î ď ) đÜđĎĎĎĎż°°°ŁŁŁ“đđ ĆŃ{>B1$7$8$H$ ĆÄľ 1$7$8$H$ Ć ĺÄ­1$7$8$H$ ĆŃ{>c1$7$8$H$ ĆŠľ 1$7$8$H$ Ć_„_„Ąţ1$7$8$H$^„_`„Ąţ ĆĚd˙1$7$8$H$á â ă ë ě 4 7 G H J L ] ^ ` a r s v w x y Š ‹ Ž   ’ á â   Ž  Ł ¤ ş ť ź ˝ Ň Ó # $  ! 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Ž1$7$8$H$ Ć%Ť „%„Űüdĺţ1$7$8$H$^„%`„Űü ĆÉ.‘ n§1$7$8$H$ ĆĚd ˙1$7$8$H$Ů67y7€77Ň7/86878‡89 9 9_9Ď9Ö9×9:y:đáđđđÎđÂÂłŁđđŁđđđđ ĆĚŔ!d ˙1$7$8$H$ Ć Ŕ{1$7$8$H$ ĆĚ1$7$8$H$ Ć=Ž"d ˙1$7$8$H$ Ć ĆĐĹ1$7$8$H$ ĆĚd ˙1$7$8$H$y:€::Đ:=;D;E;‚;đ;÷;ř;,<<¤<Ľ<ó<`=g=ďŕŕŕďŕŕÎďÂÂłď§§”ď Ćą%%d˙1$7$8$H$ ĆŚ˙1$7$8$H$ ĆĚd˙1$7$8$H$ ĆĚ1$7$8$H$ ĆčM% Ęn1$7$8$H$ ĆĚd ˙1$7$8$H$ ĆĚŔ!d ˙1$7$8$H$g=h=Ă=>=>§>Ž>Ż>?X?ż?Ć?Ç?@t@Ţ@ĺ@ć@;AđđđđđđđđđŢŢŇŔŔ­ŔŔž$ ĆĚ1$7$8$H$a$$ ĆĚŔ!d ˙1$7$8$H$a$$ ĆĚd ˙1$7$8$H$a$ Ć˝1$7$8$H$ ĆŒ< ŐW1$7$8$H$ ĆĚd ˙1$7$8$H$Ĺ?Ć?ŽD‘DcFdF’F”FGGŕGáGăGOOOOOO&O'O*O+O_O`ObOcOPP”Püúřôřúřúúúúúúúú5\H*H*6];AAĺAěAíAIBŸB CCCoCĆC2D9D:D‘DăDďÝÝÝÝÝÍ˝ŽŽŽž˝ŽŽŽ ĆĹş Z1$7$8$H$ ĆĚd ˙1$7$8$H$ ĆĚŔ!d ˙1$7$8$H$ ĆvŸK1$7$8$H$ ĆŔXŒdá1$7$8$H$$ ĆĚŔ!1$7$8$H$a$ăDSEmEtEuEJFQFRF”F˙FGGnGČGĐGŃG>HEHFHšHýHóóăŢŢĎĎĎĎăăăăăăăŔŔŔŔ ĆĚd ˙1$7$8$H$ ĆĚd˙1$7$8$H$d ˙ ĆĚŔ!d ˙1$7$8$H$ ĆĚ1$7$8$H$ýHII_I§IJhJoJpJÓJ9K{KƒK„K[LpLwLxL­LMňăăăăă×ăăÇÇť˛˛˛ťťťĽ ĆťŔ!1$7$8$H$ ĆŔ!d ˙ ĆĚ1$7$8$H$ ĆĚŔ!d ˙1$7$8$H$ Ć1$7$8$H$ ĆĚd ˙1$7$8$H$ ĆŔ!1$7$8$H$M/M6M8M†MńM NNNnNËNŇNÓNüNeOňćŮĘĘĘžą˘“˘˘˘˘ Ć ĆC° 1$7$8$H$ ĆĚd ˙1$7$8$H$ Ć× A#1$7$8$H$ Ćç!1$7$8$H$ Ćç!d ˙1$7$8$H$ ĆŻš1$7$8$H$ ĆĚ1$7$8$H$ ĆťŔ!1$7$8$H$eOlOmO^PmPuPvPwPxPyPzP|P~PP€PPéÝŘŘČš­­šƒššš ĆŰ"˙&1$7$8$H$ Ćš^1$7$8$H$ Ćš× \%1$7$8$H$ ĆĚ1$7$8$H$ ĆĚd ˙1$7$8$H$ ĆĆCu˜1$7$8$H$d ˙ Ć( 1$7$8$H$ ĆCš¨4× Ŕ!A#h$1$7$8$H$P‚PƒP„P…P†P‡PˆP‰PŠP‹PŒPPŽPPPđă×ČČťťČȨ¨˜˜‰‰ Ć Ŕ{1$7$8$H$ ĆAŹq<"1$7$8$H$ Ćą%%d˙1$7$8$H$ Ć#Č$1$7$8$H$ ĆĚd˙1$7$8$H$ ĆĚ1$7$8$H$ Ć{%1$7$8$H$ ĆĚd ˙1$7$8$H$P’P”Pđă ĆŔ61$7$8$H$ Ć äe1$7$8$H$* 00P°Đ/ °ŕ=!° "° # $ %°° ţ˙ŕ…ŸňůOhŤ‘+'łŮ0Pˆœ¨źČÔä đü  $08@Häss dcollins-xpcolcolNormalsorm1rmMicrosoft Word 9.0@@ŹţL*`Ç $?ţ˙ŐÍ՜.“—+,ůŽ0č hp|„Œ” œ¤Ź´ ź Éä† ŠMí  TitleOle ˙˙˙˙˙˙˙˙˙˙˙˙OlePres000˙˙˙˙˙˙˙˙˙˙˙˙Ÿŕ:ITEM000ODS˙˙˙˙˙˙˙˙˙˙˙˙”ITEM000FMT ˙˙˙˙˙˙˙˙˙˙˙˙~@ÝWž: OŽ&˙˙˙˙WordMicrosoft Word  ƒ)xű8˙ź@Times New Roman¸¤ówÁ¤ów 0őwç f*- Ž2 Wxƒ)CHEMISTRY TEST NAME: ______________________tœ…˝No†22†…o…23222222222222222222222222222222222222222222˝…C2eddddddddddddddddddddd 2 =xƒ) lƒ)x'˙˙h2 é>xƒ)FORMULAS AND MASS CALCULATIONS DATE: ______________________zœ˝†o2‘2žoo2‘†‘…‘…Nœo222†…C22dddddddddddddddddddddd 2 é7xƒ) lƒ)x'˙˙ű8˙@Times New Roman¸¤ówÁ¤ów 0őwç f*-ű8˙ź@Times New Roman¸¤ówÁ¤ów 0őwç f*--2 Í xƒ)Directions8YYYB8doNü- !đnšü˙˙˙-đ 2 Ínxƒ):C-g2 Đą=xƒ) For each of the following questions, choose the number that 1odC2YYYd2dB27dY2Bd88d8dc2ddYN88ddN21XdddNY28dY2dc›dYC28dY82-2 ÍÓxƒ)best oXNC2-2 Đ] xƒ)answers the YdNYCN17dY2ƒ)x'˙˙L2 ś+xƒ)question and place it on your answer sheet.ddYN88dd1Ydc2d8YYY1882dd1dddC2YdNYB2NdYY82 2 śt xƒ) Zƒ)x'˙˙-2 ™ xƒ)Directions8YYYB8doNü- !đnf-đ 2 ™nxƒ):C-‚2 œąOxƒ) For each of the following questions, all major steps must be shown to receive 1odC2YYYd2dB27dY2Bd88d8dc2ddYN88ddN21X882šY8dC2N8YcN2šdN82dY2Nddd28d2CYYX7dY2 2 œ>xƒ) [ƒ)x'˙˙2 ‚ xƒ)full credit.Bd882YCYc882 2 ‚Bxƒ) Zƒ)x'˙˙ 2 hxƒ) [ƒ)x'˙˙-&2 Mxƒ)Formulas and Mass zdY§o8dN2coo2˝dNN22 MË xƒ)Calculationsd8Yo8dB8doN 2 Mö xƒ) kƒ)x'˙˙2 3xƒ)Level 1r…YdY82d 2 3ixƒ) kƒ)x'˙˙-"2 xƒ)Multiple Choice˝o8C8o7Y2od8YY- 2 ]xƒ) Zƒ)x'˙˙ 2 xƒ) [ƒ)x'˙˙G2 ć (xƒ)1. The formula for magnesium nitrate is d22zdY2BdD›d8Y2BdC2šYdeYN8dš2d88CY7Y28N2 2 ć ­ xƒ) Zƒ)x'˙˙ű{˙@Times New Roman¸¤ówÁ¤ów 0őwç f*---2 Ě xƒ) 1) Mg(NO2222dC2˛dC- 2 " xƒ)3ƒC- 2 Ě \xƒ))ƒC- 2 " Ÿxƒ)2ƒC- 2 Ě âxƒ);ƒ8-42 " xƒ) !!!!!!"!!"!!"!!"!"!!!"!!"!!-2 Ě œxƒ)2) MgdC2˛d- 2 " ‹ xƒ)2ƒC-2 Ě Î xƒ)NO-2 " î xƒ)3 C!- 2 Ě R xƒ); 8-22 " Š xƒ) !!!"!!"!!"!!"!!"!!"!"!!!"!-2 Ě ěxƒ)3) MgNOrdC2˛d-2 " űxƒ)3 D!- 2 Ě `xƒ); 8-12 " ˜xƒ) !!!"!!"!!"!!"!!"!!"!!"!!!-2 Ě Řxƒ)4) MgeC2˛d- 2 " Čxƒ)2 C-2 Ě xƒ)(NOMC- 2 " nxƒ)3 C- 2 Ě ąxƒ)) B- 2 " óxƒ)3 B- 2 Ě 5xƒ). 2 2 Ě gxƒ) [ƒ)x'˙˙2 ˛ xƒ)ANS: 1o82d 2 ˛ ]xƒ) \ƒ)x'˙˙ 2 { xƒ) [ƒ)x'˙˙-G2 < (xƒ)2. The formula of the oxide of titanium d22zdY2BdD›d8Y2dB28dY2dc8dY2dB2887Yd8c›22 < n xƒ)is Ti08N2z8d- 2 ’ <xƒ)2 C->2 < "xƒ). The formula of the corresponding22ydY2BdDšd8Y2dB28dY2YdCCXNcddd8dd 2 < mxƒ) [ƒ)x'˙˙-R2 /xƒ) fluoride is 1) TiF; 2) TiF2222B8ddC8dY27M2222dC2z8o8222212222222222dC2z8o- 2 pŮ xƒ)2 C-+2  xƒ); 3) Ti8222222222222222cC2z8- 2 pĚxƒ)2 C-,2 xƒ)F; 4) Tio8222222221222222dC2z8- 2 p.xƒ)2 C- 2 qxƒ)F o- 2 pŕxƒ)3 B-,2 "xƒ); 5) TiF7222222222222222dC2z8o- 2 pAxƒ)4 C- 2 „xƒ). 2 2 śxƒ) [ƒ)x'˙˙2 xƒ)ANS: 5o82d 2 ]xƒ) \ƒ)x'˙˙ 2 Éxƒ) [ƒ)x'˙˙V2 ‹2xƒ)3. The correct formula for magnesium phosphate is d22zdY2YdCCXY82BdCšd8Y2CdC2šYddYN8d›2dddNddY8X28N2 2 ‹5xƒ) Zƒ)x'˙˙-2 i xƒ) 1) Mg(PO2222dC2˛dCo- 2 żůxƒ)4 C- 2 i<xƒ)) C- 2 żxƒ)2 B-#2 iÁxƒ); 2) MgPO822222222dC1˛do- 2 żv xƒ)4 C- 2 iš xƒ); 3) Mg822222222dC2˛d- 2 żp xƒ)3 C-2 ił xƒ)(POMCo- 2 żőxƒ)4 B- 2 i7xƒ)) C- 2 żzxƒ)2 C- 2 i˝xƒ); 8- 2 żőxƒ) !!!!!!!"!!"!!!-2 iĹxƒ)4) MgdC3˛d- 2 żľxƒ)2 C-2 iřxƒ)(POMCo- 2 ż:xƒ)4 C- 2 i}xƒ)) C- 2 żŔxƒ)3 B- 2 ixƒ); 8-2 ż: xƒ) !!!!!!"!!"!!-%2 iČxƒ)5) none of these. dC2dddY2dB28dYNY2 2 iţxƒ) [ƒ)x'˙˙2 2xƒ)ANS: 3o82d 2 2]xƒ) \ƒ)x'˙˙ 2 xƒ) [ƒ)x'˙˙U2 ö1xƒ)4. The correct formula for magnesium hydroxide is d22zdY2YdCCXY82BdCšd8Y2CdC2šYddYN8d›2dddCdd8dX28N 2 öxƒ) Zƒ)x'˙˙-82 Üxƒ) 1) MgOH; 2) MgOH2222dC2˛d822222222222dC2ąd- 2 2C xƒ)2 C-%2 ܆ xƒ); 3) Mg 822222222222dC2˛d- 2 2Ó xƒ)2 C-M2 Ü,xƒ)OH; 4) 2MgOH; 5) Mg(OH)812222222222dC2dąd8222222222222dC2˛dCB- 2 2)xƒ)2 C- 2 Ülxƒ). 2 2 Üžxƒ) [ƒ)x'˙˙2 Âxƒ)ANS: 5o82e 2 Â^xƒ) Ú 2 Â8xƒ) [ƒ)x'˙˙ 2 ¨xƒ) Ž 2 ¨Žxƒ) Ž 2 ¨<xƒ) ř 2 ¨4xƒ) [ƒ)x'˙˙2 Ž xƒ)5. Iron(II) d22CCddBCCC12 Ž!xƒ) chloride has the formula 1Xd8dC8cY2dYN27dY2BdDšd8Y 2 Žď xƒ) [ƒ)x'˙˙->2 t"xƒ) 1) FeC1; 2) FeCl2222dC2oY…d8222222222222222dC2oY…8- 2 ĘÖxƒ)2 C-R2 t /xƒ); 3) 2FeC1; 4) FeC18222222222221222dC2doY…d8222222222222222dC2oY…d- 2 ĘÜxƒ)4 C-+2 txƒ); 5) Fe8222222222222222dC2oY- 2 Ęćxƒ)2 C-2 t)xƒ)C1.M…d2 2 tDxƒ) [ƒ)x'˙˙-2 Zxƒ)ANS: 2o82e 2 Z^xƒ) ś - 2 °xƒ) ĺ- 2 Zůxƒ) [ƒ)x'˙˙ 2 @xƒ) [ƒ)x'˙˙U2 &1xƒ)6. What is the formula of chromium (III) sulfide? d23ťdY828N28cY2BdDšd8Y2dB2YdCdš8eš2DCCBC2Nd8B8dXX 2 &lxƒ) [ƒ)x'˙˙-2  xƒ) 1) CrS2222dC2…Co-12 bŘxƒ)3 C!!!!!"!!!"!!"!!"!!"!!"!!-2 9xƒ)2) CrdC2…D- 2 bŰxƒ)2 C- 2 xƒ)S o-(2 bxƒ)3 FC!!!!"!!"!!"!!"!!"!-2 b' xƒ) !"!!"!!!-2 1 xƒ)3) CrdC2…C- 2 bŇ xƒ)3 C- 2 xƒ)S o-42 b„xƒ)2 C!!!"!!"!!!"!!"!!"!!"!!"!!!-2 (xƒ)4) CrdC2†C- 2 bĘxƒ)3 C-52  xƒ)S 5) Cro2222222222222212222222dC2…C- 2 bhxƒ)3 C- 2 Ťxƒ)S o- 2 bxƒ)3 B- 2 \xƒ) [ƒ)x'˙˙-2 ňxƒ)ANS: 2o82e 2 ň^xƒ) Ö- 2 H4xƒ) ƒ- 2 ňˇ xƒ) Y 2 ňxƒ) [ƒ)x'˙˙ 2 ťxƒ) [ƒ)x'˙˙a2 |9xƒ)7. What is the formula for the compound aluminum sulfate?d23ťdY828N28cY2BdDšd8Y2BdC28dY2Ydšddddd2Y8dš8dd›2Nd8BY8XZ 2 |žxƒ) Zƒ)x'˙˙--2 [ xƒ) 1) AlSO 2222dC28o-2 ąhxƒ)4 CC!"-#2 [îxƒ) 2) A122222222222dC2d- 2 ąáxƒ)2 C-2 [$xƒ)SOo-2 ą# xƒ)4 C!-%2 [‡ xƒ) 3) A1 222222222222dC2d- 2 ąŹ xƒ)3 C-2 [ď xƒ)SOo- 2 ąîxƒ)4OC-%2 [1xƒ) 4) Al 222222222222dC28- 2 ą*xƒ)3OC-2 [mxƒ)(SOCBo- 2 ąŽxƒ)4OC- 2 [ńxƒ))OC- 2 ą4xƒ)2OC-%2 [wxƒ) 5) A1 222222222222dC2d- 2 ąœxƒ)2OC-2 [ßxƒ)(SOCCo- 2 ą!xƒ)4OC- 2 [dxƒ))OC- 2 ą§xƒ)3OC- 2 ąęxƒ) O;ƒ)x'˙˙-2 A xƒ)ANS: 5o82d 2 A ]xƒ) O\ƒ)x'˙˙ 2 '!xƒ) O[ƒ)x'˙˙D2 "&xƒ)8. The formula for nickel chloride is d22zdY2BdD›d8Y2BdC2d8YdX82Yd8cC8dY18N1 2 "‹ xƒ) O[ƒ)x'˙˙-;2 ó" xƒ) l) NiCl; 2) Ni222228C28…8822122222222222dC28- 2 I#Ŕxƒ)2OC-R2 ó"/xƒ)Cl; 3) 2NiCl; 4) NiCl…8822222222222221dC2d8…8822221222222222dC28…8- 2 I#Ćxƒ)2OC-;2 ó"  xƒ); 5) none of these.822222222222222cC2dddY2dB28dXNY2 2 ó"1xƒ) O[ƒ)x'˙˙2 Ů#xƒ)ANS: 4o82d 2 Ů#]xƒ) O\ƒ)x'˙˙ 2 ż$xƒ) O[ƒ)x'˙˙w2 ˆ%Hxƒ)9. The formula of ferrous oxide is FeO. The formula of ferric oxide is d22zdY2BdD›d8Y2dB2BYCCdcN2dd8dY28N2oX222zdY2BdD›d8Y2dB2BYCC8Y2dd8dY27N2 2 ˆ%(xƒ) OZƒ)x'˙˙-2 I& xƒ) 1) FeO2222dC2oY- 2 Ÿ&ůxƒ)2OC-2 I&<xƒ); C821%2 I&×xƒ) 2) Fe 222222222222dC2oY- 2 Ÿ&Đxƒ)2OC-,2 I&xƒ)O; 3) Fe8222222222222222dC2oY- 2 Ÿ&j xƒ)2OC- 2 I&­ xƒ)OO- 2 Ÿ&=xƒ)3OC-+2 I&€xƒ); 4) FeO822221222222222dC2oY- 2 Ÿ&¤xƒ)3OC-;2 I&ç xƒ); 5) none of these.822222222222222dB2dddY2dB28dYNY2 2 I&xƒ) O[ƒ)x'˙˙2 'xƒ)ANS: 3o82d 2 ']xƒ) O\ƒ)x'˙˙ 2 Ü'xƒ) O[ƒ)x'˙˙-F2 Ś('xƒ)10. The formula of stannic oxide is SnOdd22zdY2BdC›d8Y2dB2N8Ydd8Y2dd8dY18N1od- 2 ü(Š xƒ)2OC-.2 Ś(Í xƒ). The valence of Sn is222zdY2dY8YdYY2dB2nd28N 2 Ś(Äxƒ) OZƒ)x'˙˙űź"Systemç f* &Š˙˙˙˙Œč-NANIITEM000FMT#3  ŔF0‚…*`Ç0‚…*`ÇOle ˙˙˙˙˙˙˙˙OlePres000˙˙˙˙˙˙˙˙˙˙˙˙žŕ:ITEM000FMTRich Text Format8˙˙˙˙˙˙˙˙˙˙˙˙Ţuť˙˙˙˙˙˙˙˙~@ÝWž: OŽ&˙˙˙˙WordMicrosoft Word  ƒ)xű8˙ź@Times New Roman¸¤ówÁ¤ów 0őwç f*- Ž2 Wxƒ)CHEMISTRY TEST NAME: ______________________tœ…˝No†22†…o…23222222222222222222222222222222222222222222˝…C2eddddddddddddddddddddd 2 =xƒ) lƒ)x'˙˙h2 é>xƒ)FORMULAS AND MASS CALCULATIONS DATE: ______________________zœ˝†o2‘2žoo2‘†‘…‘…Nœo222†…C22dddddddddddddddddddddd 2 é7xƒ) lƒ)x'˙˙ű8˙@Times New Roman¸¤ówÁ¤ów 0őwç f*-ű8˙ź@Times New Roman¸¤ówÁ¤ów 0őwç f*--2 Í xƒ)Directions8YYYB8doNü- !đnšü˙˙˙-đ 2 Ínxƒ):C-g2 Đą=xƒ) For each of the following questions, choose the number that 1odC2YYYd2dB27dY2Bd88d8dc2ddYN88ddN21XdddNY28dY2dc›dYC28dY82-2 ÍÓxƒ)best oXNC2-2 Đ] xƒ)answers the YdNYCN17dY2ƒ)x'˙˙L2 ś+xƒ)question and place it on your answer sheet.ddYN88dd1Ydc2d8YYY1882dd1dddC2YdNYB2NdYY82 2 śt xƒ) Zƒ)x'˙˙-2 ™ xƒ)Directions8YYYB8doNü- !đnf-đ 2 ™nxƒ):C-‚2 œąOxƒ) For each of the following questions, all major steps must be shown to receive 1odC2YYYd2dB27dY2Bd88d8dc2ddYN88ddN21X882šY8dC2N8YcN2šdN82dY2Nddd28d2CYYX7dY2 2 œ>xƒ) [ƒ)x'˙˙2 ‚ xƒ)full credit.Bd882YCYc882 2 ‚Bxƒ) Zƒ)x'˙˙ 2 hxƒ) [ƒ)x'˙˙-&2 Mxƒ)Formulas and Mass zdY§o8dN2coo2˝dNN22 MË xƒ)Calculationsd8Yo8dB8doN 2 Mö xƒ) kƒ)x'˙˙2 3xƒ)Level 1r…YdY82d 2 3ixƒ) kƒ)x'˙˙-"2 xƒ)Multiple Choice˝o8C8o7Y2od8YY- 2 ]xƒ) Zƒ)x'˙˙ 2 xƒ) [ƒ)x'˙˙G2 ć (xƒ)1. The formula for magnesium nitrate is d22zdY2BdD›d8Y2BdC2šYdeYN8dš2d88CY7Y28N2 2 ć ­ xƒ) Zƒ)x'˙˙ű{˙@Times New Roman¸¤ówÁ¤ów 0őwç f*---2 Ě xƒ) 1) Mg(NO2222dC2˛dC- 2 " xƒ)3ƒC- 2 Ě \xƒ))ƒC- 2 " Ÿxƒ)2ƒC- 2 Ě âxƒ);ƒ8-42 " xƒ) !!!!!!"!!"!!"!!"!"!!!"!!"!!-2 Ě œxƒ)2) MgdC2˛d- 2 " ‹ xƒ)2ƒC-2 Ě Î xƒ)NO-2 " î xƒ)3 C!- 2 Ě R xƒ); 8-22 " Š xƒ) !!!"!!"!!"!!"!!"!!"!"!!!"!-2 Ě ěxƒ)3) MgNOrdC2˛d-2 " űxƒ)3 D!- 2 Ě `xƒ); 8-12 " ˜xƒ) !!!"!!"!!"!!"!!"!!"!!"!!!-2 Ě Řxƒ)4) MgeC2˛d- 2 " Čxƒ)2 C-2 Ě xƒ)(NOMC- 2 " nxƒ)3 C- 2 Ě ąxƒ)) B- 2 " óxƒ)3 B- 2 Ě 5xƒ). 2 2 Ě gxƒ) [ƒ)x'˙˙2 ˛ xƒ)ANS: 1o82d 2 ˛ ]xƒ) \ƒ)x'˙˙ 2 { xƒ) [ƒ)x'˙˙-G2 < (xƒ)2. The formula of the oxide of titanium d22zdY2BdD›d8Y2dB28dY2dc8dY2dB2887Yd8c›22 < n xƒ)is Ti08N2z8d- 2 ’ <xƒ)2 C->2 < "xƒ). The formula of the corresponding22ydY2BdDšd8Y2dB28dY2YdCCXNcddd8dd 2 < mxƒ) [ƒ)x'˙˙-R2 /xƒ) fluoride is 1) TiF; 2) TiF2222B8ddC8dY27M2222dC2z8o8222212222222222dC2z8o- 2 pŮ xƒ)2 C-+2  xƒ); 3) Ti8222222222222222cC2z8- 2 pĚxƒ)2 C-,2 xƒ)F; 4) Tio8222222221222222dC2z8- 2 p.xƒ)2 C- 2 qxƒ)F o- 2 pŕxƒ)3 B-,2 "xƒ); 5) TiF7222222222222222dC2z8o- 2 pAxƒ)4 C- 2 „xƒ). 2 2 śxƒ) [ƒ)x'˙˙2 xƒ)ANS: 5o82d 2 ]xƒ) \ƒ)x'˙˙ 2 Éxƒ) [ƒ)x'˙˙V2 ‹2xƒ)3. The correct formula for magnesium phosphate is d22zdY2YdCCXY82BdCšd8Y2CdC2šYddYN8d›2dddNddY8X28N2 2 ‹5xƒ) Zƒ)x'˙˙-2 i xƒ) 1) Mg(PO2222dC2˛dCo- 2 żůxƒ)4 C- 2 i<xƒ)) C- 2 żxƒ)2 B-#2 iÁxƒ); 2) MgPO822222222dC1˛do- 2 żv xƒ)4 C- 2 iš xƒ); 3) Mg822222222dC2˛d- 2 żp xƒ)3 C-2 ił xƒ)(POMCo- 2 żőxƒ)4 B- 2 i7xƒ)) C- 2 żzxƒ)2 C- 2 i˝xƒ); 8- 2 żőxƒ) !!!!!!!"!!"!!!-2 iĹxƒ)4) MgdC3˛d- 2 żľxƒ)2 C-2 iřxƒ)(POMCo- 2 ż:xƒ)4 C- 2 i}xƒ)) C- 2 żŔxƒ)3 B- 2 ixƒ); 8-2 ż: xƒ) !!!!!!"!!"!!-%2 iČxƒ)5) none of these. dC2dddY2dB28dYNY2 2 iţxƒ) [ƒ)x'˙˙2 2xƒ)ANS: 3o82d 2 2]xƒ) \ƒ)x'˙˙ 2 xƒ) [ƒ)x'˙˙U2 ö1xƒ)4. The correct formula for magnesium hydroxide is d22zdY2YdCCXY82BdCšd8Y2CdC2šYddYN8d›2dddCdd8dX28N 2 öxƒ) Zƒ)x'˙˙-82 Üxƒ) 1) MgOH; 2) MgOH2222dC2˛d822222222222dC2ąd- 2 2C xƒ)2 C-%2 ܆ xƒ); 3) Mg 822222222222dC2˛d- 2 2Ó xƒ)2 C-M2 Ü,xƒ)OH; 4) 2MgOH; 5) Mg(OH)812222222222dC2dąd8222222222222dC2˛dCB- 2 2)xƒ)2 C- 2 Ülxƒ). 2 2 Üžxƒ) [ƒ)x'˙˙2 Âxƒ)ANS: 5o82e 2 Â^xƒ) Ú 2 Â8xƒ) [ƒ)x'˙˙ 2 ¨xƒ) Ž 2 ¨Žxƒ) Ž 2 ¨<xƒ) ř 2 ¨4xƒ) [ƒ)x'˙˙2 Ž xƒ)5. Iron(II) d22CCddBCCC12 Ž!xƒ) chloride has the formula 1Xd8dC8cY2dYN27dY2BdDšd8Y 2 Žď xƒ) [ƒ)x'˙˙->2 t"xƒ) 1) FeC1; 2) FeCl2222dC2oY…d8222222222222222dC2oY…8- 2 ĘÖxƒ)2 C-R2 t /xƒ); 3) 2FeC1; 4) FeC18222222222221222dC2doY…d8222222222222222dC2oY…d- 2 ĘÜxƒ)4 C-+2 txƒ); 5) Fe8222222222222222dC2oY- 2 Ęćxƒ)2 C-2 t)xƒ)C1.M…d2 2 tDxƒ) [ƒ)x'˙˙-2 Zxƒ)ANS: 2o82e 2 Z^xƒ) ś - 2 °xƒ) ĺ- 2 Zůxƒ) [ƒ)x'˙˙ 2 @xƒ) [ƒ)x'˙˙U2 &1xƒ)6. What is the formula of chromium (III) sulfide? d23ťdY828N28cY2BdDšd8Y2dB2YdCdš8eš2DCCBC2Nd8B8dXX 2 &lxƒ) [ƒ)x'˙˙-2  xƒ) 1) CrS2222dC2…Co-12 bŘxƒ)3 C!!!!!"!!!"!!"!!"!!"!!"!!-2 9xƒ)2) CrdC2…D- 2 bŰxƒ)2 C- 2 xƒ)S o-(2 bxƒ)3 FC!!!!"!!"!!"!!"!!"!-2 b' xƒ) !"!!"!!!-2 1 xƒ)3) CrdC2…C- 2 bŇ xƒ)3 C- 2 xƒ)S o-42 b„xƒ)2 C!!!"!!"!!!"!!"!!"!!"!!"!!!-2 (xƒ)4) CrdC2†C- 2 bĘxƒ)3 C-52  xƒ)S 5) Cro2222222222222212222222dC2…C- 2 bhxƒ)3 C- 2 Ťxƒ)S o- 2 bxƒ)3 B- 2 \xƒ) [ƒ)x'˙˙-2 ňxƒ)ANS: 2o82e 2 ň^xƒ) Ö- 2 H4xƒ) ƒ- 2 ňˇ xƒ) Y 2 ňxƒ) [ƒ)x'˙˙ 2 ťxƒ) [ƒ)x'˙˙a2 |9xƒ)7. What is the formula for the compound aluminum sulfate?d23ťdY828N28cY2BdDšd8Y2BdC28dY2Ydšddddd2Y8dš8dd›2Nd8BY8XZ 2 |žxƒ) Zƒ)x'˙˙--2 [ xƒ) 1) AlSO 2222dC28o-2 ąhxƒ)4 CC!"-#2 [îxƒ) 2) A122222222222dC2d- 2 ąáxƒ)2 C-2 [$xƒ)SOo-2 ą# xƒ)4 C!-%2 [‡ xƒ) 3) A1 222222222222dC2d- 2 ąŹ xƒ)3 C-2 [ď xƒ)SOo- 2 ąîxƒ)4OC-%2 [1xƒ) 4) Al 222222222222dC28- 2 ą*xƒ)3OC-2 [mxƒ)(SOCBo- 2 ąŽxƒ)4OC- 2 [ńxƒ))OC- 2 ą4xƒ)2OC-%2 [wxƒ) 5) A1 222222222222dC2d- 2 ąœxƒ)2OC-2 [ßxƒ)(SOCCo- 2 ą!xƒ)4OC- 2 [dxƒ))OC- 2 ą§xƒ)3OC- 2 ąęxƒ) O;ƒ)x'˙˙-2 A xƒ)ANS: 5o82d 2 A ]xƒ) O\ƒ)x'˙˙ 2 '!xƒ) O[ƒ)x'˙˙D2 "&xƒ)8. The formula for nickel chloride is d22zdY2BdD›d8Y2BdC2d8YdX82Yd8cC8dY18N1 2 "‹ xƒ) O[ƒ)x'˙˙-;2 ó" xƒ) l) NiCl; 2) Ni222228C28…8822122222222222dC28- 2 I#Ŕxƒ)2OC-R2 ó"/xƒ)Cl; 3) 2NiCl; 4) NiCl…8822222222222221dC2d8…8822221222222222dC28…8- 2 I#Ćxƒ)2OC-;2 ó"  xƒ); 5) none of these.822222222222222cC2dddY2dB28dXNY2 2 ó"1xƒ) O[ƒ)x'˙˙2 Ů#xƒ)ANS: 4o82d 2 Ů#]xƒ) O\ƒ)x'˙˙ 2 ż$xƒ) O[ƒ)x'˙˙w2 ˆ%Hxƒ)9. The formula of ferrous oxide is FeO. The formula of ferric oxide is d22zdY2BdD›d8Y2dB2BYCCdcN2dd8dY28N2oX222zdY2BdD›d8Y2dB2BYCC8Y2dd8dY27N2 2 ˆ%(xƒ) OZƒ)x'˙˙-2 I& xƒ) 1) FeO2222dC2oY- 2 Ÿ&ůxƒ)2OC-2 I&<xƒ); C821%2 I&×xƒ) 2) Fe 222222222222dC2oY- 2 Ÿ&Đxƒ)2OC-,2 I&xƒ)O; 3) Fe8222222222222222dC2oY- 2 Ÿ&j xƒ)2OC- 2 I&­ xƒ)OO- 2 Ÿ&=xƒ)3OC-+2 I&€xƒ); 4) FeO822221222222222dC2oY- 2 Ÿ&¤xƒ)3OC-;2 I&ç xƒ); 5) none of these.822222222222222dB2dddY2dB28dYNY2 2 I&xƒ) O[ƒ)x'˙˙2 'xƒ)ANS: 3o82d 2 ']xƒ) O\ƒ)x'˙˙ 2 Ü'xƒ) O[ƒ)x'˙˙-F2 Ś('xƒ)10. The formula of stannic oxide is SnOdd22zdY2BdC›d8Y2dB2N8Ydd8Y2dd8dY18N1od- 2 ü(Š xƒ)2OC-.2 Ś(Í xƒ). The valence of Sn is222zdY2dY8YdYY2dB2nd28N 2 Ś(Äxƒ) OZƒ)x'˙˙űź"Systemç f* &Š˙˙˙˙Œč-NANIqť      !"#$%&'()*+,-./0123456789:;ţ˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙˙qť{\rtf1\ansi\ansicpg1252\uc1 \deff0\deflang1033\deflangfe1033{\fonttbl{\f0\froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}{\f28\froman\fcharset238\fprq2 Times New Roman CE;}{\f29\froman\fcharset204\fprq2 Times New Roman Cyr;} {\f31\froman\fcharset161\fprq2 Times New Roman Greek;}{\f32\froman\fcharset162\fprq2 Times New Roman Tur;}{\f33\froman\fcharset177\fprq2 Times New Roman (Hebrew);}{\f34\froman\fcharset178\fprq2 Times New Roman (Arabic);} {\f35\froman\fcharset186\fprq2 Times New Roman Baltic;}}{\colortbl;\red0\green0\blue0;\red0\green0\blue255;\red0\green255\blue255;\red0\green255\blue0;\red255\green0\blue255;\red255\green0\blue0;\red255\green255\blue0;\red255\green255\blue255; \red0\green0\blue128;\red0\green128\blue128;\red0\green128\blue0;\red128\green0\blue128;\red128\green0\blue0;\red128\green128\blue0;\red128\green128\blue128;\red192\green192\blue192;}{\stylesheet{ \ql \li0\ri0\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 \snext0 Normal;}{\s1\ql \li0\ri0\keepn\nowidctlpar\tx204\tx5760\tx8640\faauto\outlinelevel0\rin0\lin0\itap0 \b\fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 \sbasedon0 \snext0 heading 1;}{\*\cs10 \additive Default Paragraph Font;}{\s15\ql \li0\ri0\sl232\slmult0\nowidctlpar\tqdec\tx209\tqdec\tx498\tqdec\tx5040\tqdec\tx8197\faauto\rin0\lin0\itap0 \fs20\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 \sbasedon0 \snext15 Body Text;}{\s16\ql \li360\ri0\sl243\slmult0\nowidctlpar\tx204\faauto\rin0\lin360\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 \sbasedon0 \snext16 Body Text 2;}{ \s17\ql \fi-270\li270\ri0\sl243\slmult0\nowidctlpar\tx204\faauto\rin0\lin270\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 \sbasedon0 \snext17 Body Text Indent 2;}}\margl1440\margr1440 \widowctrl\ftnbj\aenddoc\noxlattoyen\expshrtn\noultrlspc\dntblnsbdb\nospaceforul\formshade\horzdoc\dgmargin\dghspace180\dgvspace180\dghorigin1701\dgvorigin1984\dghshow1\dgvshow1 \jexpand\pgbrdrhead\pgbrdrfoot\splytwnine\ftnlytwnine\htmautsp\nolnhtadjtbl\useltbaln\alntblind\lytcalctblwd\lyttblrtgr\lnbrkrule \fet0\sectd \sbknone\linex0\headery1440\sectdefaultcl {\*\pnseclvl1\pnucrm\pnstart1\pnindent720\pnhang{\pntxta .}} {\*\pnseclvl2\pnucltr\pnstart1\pnindent720\pnhang{\pntxta .}}{\*\pnseclvl3\pndec\pnstart1\pnindent720\pnhang{\pntxta .}}{\*\pnseclvl4\pnlcltr\pnstart1\pnindent720\pnhang{\pntxta )}}{\*\pnseclvl5\pndec\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}} {\*\pnseclvl6\pnlcltr\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl7\pnlcrm\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl8\pnlcltr\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl9 \pnlcrm\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}\pard\plain \s1\ql \li0\ri0\keepn\nowidctlpar\tx204\tx5760\tx8640\faauto\outlinelevel0\rin0\lin0\itap0 \b\fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 { CHEMISTRY TEST NAME: ______________________ \par }\pard\plain \ql \li0\ri0\nowidctlpar\tx204\tx5760\tx8640\faauto\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {\b FORMULAS AND MASS CALCULATIONS DATE: ______________________ \par }{\b\ul Directions}{\b :}{ For each of the following questions, choose the number that }{\b best }{answers the question and place it on your answer sheet. \par }{\b\ul Directions}{\b :}{ For each of the following questions, all major steps must be shown to receive \par full credit. \par \par }\pard \ql \li0\ri0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {\b Formulas and Mass Calculations \par }\pard\plain \s1\ql \li0\ri0\keepn\nowidctlpar\tx204\tx8640\faauto\outlinelevel0\rin0\lin0\itap0 \b\fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {Level 1 \par }\pard\plain \ql \li0\ri0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {\b Multiple Choice}{ \par \par 1. The formula for magnesium nitrate is \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { 1) Mg(NO}{\sub 3}{)}{\sub 2}{;}{\sub }{2) Mg}{\sub 2}{NO}{\sub 3 }{;}{\sub }{3) MgNO}{\sub 3 }{;}{\sub }{4) Mg} {\sub 2}{(NO}{\sub 3}{)}{\sub 3}{. \par }\pard \ql \li0\ri0\nowidctlpar\tx521\faauto\rin0\lin0\itap0 {ANS: 1 \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 2. The formula of the oxide of titanium is Ti0}{\sub 2}{. The formula of the corresponding \par }\pard \ql \li0\ri0\nowidctlpar\tx1598\tqdec\tx4195\tx4886\tqdec\tx7653\tqdec\tx9218\faauto\rin0\lin0\itap0 { fluoride is 1) TiF; 2) TiF}{\sub 2}{; 3) Ti}{\sub 2}{F; 4) Ti}{\sub 2}{F}{\sub 3}{ ; 5) TiF}{\sub 4}{. \par ANS: 5 \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 3. The correct formula for magnesium phosphate is \par }\pard \ql \fi-351\li351\ri0\nowidctlpar\tx351\faauto\rin0\lin351\itap0 { 1) Mg(PO}{\sub 4}{)}{\sub 2}{; 2) MgPO}{\sub 4}{; 3) Mg}{\sub 3}{(PO}{\sub 4}{)}{\sub 2}{;}{\sub }{4) Mg}{\sub 2}{(PO}{\sub 4}{)}{\sub 3}{;}{\sub }{5) none of these. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx6825\tqdec\tx8373\faauto\rin0\lin0\itap0 { \par 4. The correct formula for magnesium hydroxide is \par 1) MgOH; 2) MgOH}{\sub 2}{; 3) Mg}{\sub 2}{OH; 4) 2MgOH; 5) Mg(OH)}{\sub 2}{. \par ANS: 5\tab \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tx379\tx1598\tqdec\tx4195\faauto\rin0\lin0\itap0 {\tab \tab \tab \par }\pard \ql \li0\ri0\nowidctlpar\tx4325\tx5828\tx7341\faauto\rin0\lin0\itap0 {5. Iron(II) chloride has the formula \par 1) FeC1; 2) FeCl}{\sub 2}{; 3) 2FeC1; 4) FeC1}{\sub 4}{; 5) Fe}{\sub 2}{C1. \par ANS: 2\tab }{\sub \tab }{ \par }\pard \ql \li0\ri0\nowidctlpar\tx5828\tqdec\tx8373\faauto\rin0\lin0\itap0 { \par 6. What is the formula of chromium (III) sulfide? \par 1) CrS}{\sub 3 }{2) Cr}{\sub 2}{S}{\sub 3 }{3) Cr}{\sub 3}{S}{\sub 2 }{4) Cr}{\sub 3}{S 5) Cr}{\sub 3}{S}{\sub 3}{ \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tx379\tx1598\tqdec\tx3906\faauto\rin0\lin0\itap0 {ANS: 2\tab }{\sub \tab }{\tab \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 7. What is the formula for the compound aluminum sulfate? \par }\pard \ql \fi-351\li351\ri0\nowidctlpar\tx351\tx8640\faauto\rin0\lin351\itap0 { 1) AlSO}{\sub 4 }{ 2) A1}{\sub 2}{SO}{\sub 4 }{ 3) A1}{\sub 3}{SO}{\sub 4}{ 4) Al}{\sub 3}{(SO}{\sub 4}{)}{\sub 2}{ 5) A1}{ \sub 2}{(SO}{\sub 4}{)}{\sub 3 \par }\pard \ql \li0\ri0\nowidctlpar\tx521\faauto\rin0\lin0\itap0 {ANS: 5 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx2653\tqr\tx4518\faauto\rin0\lin0\itap0 { \par 8. The formula for nickel chloride is \par l) NiCl; 2) Ni}{\sub 2}{Cl; 3) 2NiCl; 4) NiCl}{\sub 2}{; 5) none of these. \par }\pard \ql \li0\ri0\nowidctlpar\tx2976\tqdec\tx5601\faauto\rin0\lin0\itap0 {ANS: 4 \par \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {9. The formula of ferrous oxide is FeO. The formula of ferric oxide is \par 1) FeO}{\sub 2}{; 2) Fe}{\sub 2}{O; 3) Fe}{\sub 2}{O}{\sub 3}{; 4) FeO}{\sub 3}{; 5) none of these. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par \par 10. The formula of stannic oxide is SnO}{\sub 2}{. The valence of Sn is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tqdec\tx606\tqdec\tx1984\tqdec\tx3186\faauto\rin0\lin0\itap0 { 1)\tab +1; 2) +2; 3) +3; 4) +4; 5) -2. \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\nowidctlpar\tx187\faauto\rin0\lin0\itap0 { \par 11. Which is the formula of a compound? \par 1) C 2) Cl}{\sub 2}{ 3) N}{\sub 2}{ 4) HF 5) none of these \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 12. \'93M\'94 represents a metallic element, the oxide of which has the formula M}{\sub 2}{O. \par The formula of the chloride of M is 1) MCl; 2) MC1}{\sub 2}{; 3) MC1}{\sub 3}{; \par }{\sub }{4) MC1}{\sub 4}{. \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 1 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx328\tqdec\tx697\tqdec\tx1916\tqdec\tx3078\tqdec\tx4342\tx5011\faauto\rin0\lin0\itap0 { \par 13. If the valence of oxygen is -2, the valence of titanium in the formula TiO}{\sub 2 }{is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx600\tqdec\tx1037\tqdec\tx2188\tqdec\tx3186\faauto\rin0\lin0\itap0 { 1) +2; 2) \endash 2; 3) +4; 4) -4. \par ANS: 3 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx3855\tqdec\tx4155\faauto\rin0\lin0\itap0 {\tab \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx9270\faauto\rin0\lin0\itap0 {14. Acetylene, C}{\sub 2}{H}{\sub 2}{, and benzene, C}{\sub 6}{H}{\sub 6}{, have the same empirical (simplest) formula, \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\tx9270\faauto\rin0\lin0\itap0 { C}{\sub 1}{H}{\sub 1}{. The molecular formulas could be found by determining 1) the mole ratios; \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx9270\faauto\rin0\lin0\itap0 { 2) the combining ratios; 3) the molecular masses; 4) the heats of \par formation. \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 15. Which is the correct name for Fe}{\sub 2}{(SO}{\sub 4}{)}{\sub 3 }{? 1) Iron (II) sulfate \par 2) iron (III) sulfate 3) iron (IV) sulfate 4) iron(II) sulfite 5) iron(III) sulfite \par }\pard \ql \li0\ri0\nowidctlpar\tx362\faauto\rin0\lin0\itap0 {ANS: 2 \par \par }\pard \ql \li0\ri0\nowidctlpar\tx5635\tqdec\tx8226\tqdec\tx10142\faauto\rin0\lin0\itap0 {16. The correct formula for barium hydroxide is \par 1) BaOH; 2) BaOH}{\sub 2}{; 3) Ba(OH)}{\sub 2}{; 4) Ba}{\sub 2}{OH; 5) Ba}{\sub 3}{(OH)}{\sub 2}{. \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx328\tx459\tqdec\tx3078\faauto\rin0\lin0\itap0 {ANS: 3 \par \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {17. When writing a chemical formula, the element with a positive valence 1) is written \par last; 2) needs no subscript; 3) is written first; 4) is placed in parentheses. \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 18. The formula CuSO}{\sub 11}{. represents \par 1) hydrated cupric sulfate; 2) blue crystalline cupric sulfate; \par 3) the anhydride of cupric sulfate; 4) anhydrous cupric sulfate.}{\b \tab }{ \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 19. What is the formula for chromium (III) oxide? \par 1) CrO 2) Cr}{\sub 2}{O 3) Cr}{\sub 3}{O 4) Cr}{\sub 2}{O}{\sub 3 }{ 5) Cr}{\sub 3}{O}{\sub 2}{ \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tqdec\tx606\tqdec\tx1700\tqdec\tx3033\tqdec\tx4195\tx4886\faauto\rin0\lin0\itap0 { \par 20. The formula of an oxide of tin is SnO}{\sub 2}{. The formula of the corresponding chloride is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx2653\tqr\tx4518\faauto\rin0\lin0\itap0 { 1) SnC1; 2) SnCl}{\sub 2}{; 3) Sn}{\sub 2}{C1; 4) SnC1}{\sub 3}{; 5) SnC1}{\sub 4}{. \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 5 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 21. Silver hydrogen phosphate has the formula Ag}{\sub 2}{HPO}{\sub 4}{. What is the formula for \par ferric hydrogen phosphate? \par 1) Fe}{\sub 2}{HPO}{\sub 4 }{3) Fe}{\sub 2}{(HPO}{\sub 4}{)}{\sub 3 \par }\pard \ql \fi-374\li374\ri0\sl-243\slmult0\nowidctlpar\tx374\faauto\rin0\lin374\itap0 { 2) Fe}{\sub 3}{(HPO}{\sub 4}{)}{\sub 2 }{4) Fe(HPO}{\sub 4}{)}{\sub 3 }{ 5) Fe(HPO}{\sub 4}{)}{\sub 2}{ \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \fi-270\li270\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin270\itap0 { \par 22. Barium hypochlorite has the formula Ba(ClO)}{\sub 2}{. Determine the formula for chromic hypochlorite. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { 1) CrC1O 2) Cr(ClO)}{\sub 3}{ 3) Cr}{\sub 2}{(ClO)}{\sub 3}{ 4) Cr}{\sub 3}{(ClO)}{\sub 2}{ 5) Cr(ClO)}{\sub 2}{ \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 2 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 23. A molecule of a binary compound must 1) consist of two atoms; 2) contain \par a metal and a nonmetal; 3) result from electron transfer; 4) contain only \par two elements. \par }\pard \ql \li0\ri0\nowidctlpar\tx4665\tqdec\tx7097\tqdec\tx8923\faauto\rin0\lin0\itap0 {ANS: 4 \par \par 24. The formula of a binary compound is \par 1) NH}{\sub 4}{OH; 2) P}{\sub 4}{O}{\sub 10}{; 3) Pb(NO}{\sub 3}{)}{\sub 2}{; 4) CaCO}{\sub 3}{. \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 2 \par }\pard \ql \li0\ri0\sl-249\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 25. Which formula is }{\b not}{ correct?\tab }{\sub \tab \tab \par }{ 1) A1}{\sub 2}{(SO}{\sub 4}{)}{\sub 3 }{ 2) BaHCO}{\sub 3 }{ 3) Ca(OH)}{\sub 2 }{ 4) NH}{\sub 4}{HSO}{\sub 4}{ 5) LiH \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 2 \par \par 26. How many atoms are in one molecule of ammonium dichromate? \par 1) 14 2) 15 3) 19 4) 23 5) none of these \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tqdec\tx606\tqdec\tx1893\tqdec\tx3242\tqdec\tx4586\tx5244\faauto\rin0\lin0\itap0 {ANS: 3 \par \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {27. How many atoms are in one molecule of chromic hydrogen carbonate? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tqdec\tx606\tqdec\tx1893\tqdec\tx3242\tqdec\tx4586\tx5244\faauto\rin0\lin0\itap0 { 1) 6 2) 11 3) 14 4) 16 5) none of these \par ANS: 4 \par \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {28. One molecule of barium phosphate contains how many atoms? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tqdec\tx606\tqdec\tx1893\tqdec\tx3242\tqdec\tx4586\tx5244\faauto\rin0\lin0\itap0 { 1) 6 2) 11 3) 13 4) 17 5) none of these \par ANS: 3 \par }\pard \ql \fi-351\li351\ri0\nowidctlpar\tx351\tx8640\faauto\rin0\lin351\itap0 { \par }\pard \ql \fi-351\li351\ri0\nowidctlpar\tx351\faauto\rin0\lin351\itap0 {29. The total number of atoms of oxygen represented in Na}{\sub 2}{B}{\sub 4}{O}{\sub 7}{\b\super .}{10 H}{\sub 2}{O is \par l) 7; 2) 10; 3) 17; 4) 20; 5) 27. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx351\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 30. The number of atoms of nitrogen represented in one molecule of ammonium nitrate is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tqdec\tx606\tqdec\tx1700\tqdec\tx3033\tqdec\tx4195\tx4886\faauto\rin0\lin0\itap0 { 1) 1; 2) 2; 3) 3; 4) 4; 5) none of these. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx351\faauto\rin0\lin0\itap0 {ANS: 2 \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 31. The total number of atoms of }{\b oxygen}{ represented in the expression 3 H}{\sub 2}{SO}{\sub 4 }{is \par }\pard \ql \fi-1519\li1519\ri0\nowidctlpar\tx1519\faauto\rin0\lin1519\itap0 { 1) 1; 2) 7; 3) 3; 4) 4; 5) 12. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx351\faauto\rin0\lin0\itap0 {ANS: 5 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 32. One molecule of potassium nitrate has how many atoms? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx328\tqdec\tx697\tqdec\tx1916\tqdec\tx3078\tqdec\tx4342\tx5011\faauto\rin0\lin0\itap0 { 1) 5 2) 6 3) 7 4) 9 5) none of these \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 1 \par \par 33. The total number of atoms of oxygen represented in the formula ZnSO}{\sub 4}{\bullet 7H}{\sub 2}{O is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tqdec\tx606\tqdec\tx1893\faauto\rin0\lin0\itap0 { 1) 18; 2) 14; 3) 11; 4) 4; 5) 5. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\nowidctlpar\tx323\tqdec\tx7097\tx7336\tqdec\tx7988\tqdec\tx8407\tqdec\tx9025\tqdec\tx9320\faauto\rin0\lin0\itap0 { \par 34. The number of atoms of }{\b hydrogen}{ in the expression \'933 H}{\sub 2}{SO}{\sub 4}{\'94 is\tab \par 1) 2; 2) 3; 3) 4; 4) 6. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 35. How many atoms are in one molecule of chromic acetate? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx317\tqdec\tx799\tqdec\tx1989\tqdec\tx3361\tqdec\tx4750\tqdec\tx5992\faauto\rin0\lin0\itap0 { 1) 8 2) 15 3) 17 4) 19 5) 22 \par ANS: 5 \par \par }\pard \ql \fi-270\li270\ri0\nowidctlpar\tqdec\tx317\tqdec\tx799\tqdec\tx1989\tqdec\tx3361\tqdec\tx4750\tqdec\tx5992\faauto\rin0\lin270\itap0 {36. The total number of atoms represented by the formula (NH}{\sub 4}{)}{\sub 2}{Cr}{\sub 2}{O}{\sub 7 }{ is 1) 11; 2) 18; 3) 19; 4) 23. \par }\pard \ql \li0\ri0\nowidctlpar\tx374\tx708\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 37. How many atoms are in one molecule of ferric chlorate? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx317\tqdec\tx629\tqdec\tx1859\tqdec\tx2982\tqdec\tx4416\tqdec\tx5646\faauto\rin0\lin0\itap0 { 1) \tab 5 2) 7 3) 9 4) 13 5) 14 \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 38. Find the number of atoms in one molecule of ammonium sulfate.}{\b \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx198\tqdec\tx629\tqdec\tx1859\tqdec\tx3197\tqdec\tx4626\tqdec\tx5833\tx8640\faauto\rin0\lin0\itap0 { 1) 8 2) 10 3) 15 4) 20 5) 25 \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 39. The total number of oxygen atoms represented in the formula Co(NO}{\sub 3}{)}{\sub 2}{\b\super .}{6H}{\sub 2}{O is \par 1) 3; 2) 6; 3) 9; 4) 12; 5) 13. \par ANS: 4 \par \par 40. The total number of atoms of oxygen present in the formula aluminum sulfate is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx317\tqdec\tx629\tqdec\tx1859\tqdec\tx3197\tqdec\tx4416\tqdec\tx5646\faauto\rin0\lin0\itap0 { 1) \tab 6; 2) 9; 3) 12; 4) 17; 5) 24. \par ANS: 3 \par \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {41. The formula for chromic sulfate has how many atoms in one molecule? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx198\tqdec\tx629\tqdec\tx1695\tqdec\tx2851\tqdec\tx4104\tqdec\tx5215\faauto\rin0\lin0\itap0 { 1) 5 2) 9 3) 10 4) 15 5) 17 \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 5 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 42. The number of atoms represented in the formula Co(NO}{\sub 3}{)}{\sub 2}{\b\super .}{6H}{\sub 2}{O is \par 1) 4; 2) 9; 3) 18; 4) 21; 5) 27. \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx198\tqdec\tx629\tqdec\tx1859\tqdec\tx2982\faauto\rin0\lin0\itap0 {ANS: 5 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 43. The total number of atoms in the formula aluminum acetate is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx232\tqdec\tx589\tqdec\tx1689\tqdec\tx2897\tqdec\tx3838\tqdec\tx5272\tx8640\faauto\rin0\lin0\itap0 { 1) 9; 2) 10; 3) 13; 4) 15; 5) 22. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 5 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 44. The number of atoms in one molecule of iron (III) sulfate is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx232\tqdec\tx589\tqdec\tx1689\tqdec\tx2897\faauto\rin0\lin0\itap0 { 1) 6; 2) 8; 3 ) 13; 4) 17; 5) none of these. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx192\tx379\tx4098\faauto\rin0\lin0\itap0 { \par 45. How many atoms are in }{\b three}{ molecules of acetone, CH}{\sub 3}{COCH}{\sub 3 }{? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx895\tqdec\tx1252\tqdec\tx5221\faauto\rin0\lin0\itap0 { 1) 3 2) 9 3) 15 4) 18 5) 30 \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 5 \par \par 46. The formula mass of aluminum sulfate is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx192\tx362\tx2080\tqr\tx5601\faauto\rin0\lin0\itap0 { 1) 123 grams; 2) 214 grams; 3) 278 grams; 4) 342 grams. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 47. Find the molecular mass of zinc nitrate. \par }\pard \ql \fi-362\li362\ri0\sl-243\slmult0\nowidctlpar\tx362\tx8640\faauto\rin0\lin362\itap0 { 1) 127 2) 189 3) 192 4) 261 5) 304 \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 2 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 48. The molecular mass of trinitrotoluene, C}{\sub 7}{H}{\sub 5}{(NO}{\sub 2}{) is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx198\tqdec\tx799\tqdec\tx2239\tqdec\tx3514\faauto\rin0\lin0\itap0 { 1) 135; 2) 199; 3) 227; 4) 315; 5) 329. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \fi-1519\li1519\ri0\nowidctlpar\tx1519\faauto\rin0\lin1519\itap0 { \par 49. The molecular weight of Mg(NO}{\sub 3}{)}{\sub 2 }{is approximately \par 1) 86; 2) 134; 3) 148; 4) 172; 5) 181. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par \par 50. Any given }{\b mass}{ of oxygen and hydrogen which have the same number of atoms are \par in the ratio of 1) 1:2; 2) 2:1; 3) 1:8; 4) 16:1; 5) 3:1. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 51. The heaviest of the following gases is 1) CH}{\sub 4}{; }{\sub }{2) N}{\sub 2}{O; 3) NO}{\sub 2}{; }{\sub }{4) SO}{\sub 2}{. \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx5646\tqdec\tx6927\tqdec\tx8254\tqdec\tx9320\faauto\rin0\lin0\itap0 { \par 52. Which is the }{\b lightest}{ of the following gases?\tab \par 1) NO 2) CH}{\sub 4}{ 3) SO}{\sub 2}{ 4) CO \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 2 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 53. The formula mass of carbon dioxide is \par 1) 12; 2) 28; 3) 32; 4) 40; 5) 44. \par ANS: 4 \par \par 54. Find the molecular mass of calcium phosphate. \par }\pard \ql \fi-374\li374\ri0\sl-243\slmult0\nowidctlpar\tx374\faauto\rin0\lin374\itap0 { 1) 127 2) 135 3) 365 4) 403 5) none of these \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 5 \par }\pard \ql \li0\ri0\sl-238\slmult0\nowidctlpar\tqdec\tx895\tqdec\tx1457\tqdec\tx5669\tqdec\tx9490\faauto\rin0\lin0\itap0 { \par 55. If the atomic mass scale were revised to assign carbon the value 3.0, what value \par }\pard \ql \li0\ri0\sl-238\slmult0\nowidctlpar\tx833\tx1196\tqdec\tx4977\tqdec\tx8764\faauto\rin0\lin0\itap0 { would be assigned to sulfur?\line 1) 96 2) 56 3) 32 4) 8.0 5) 4.0 \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par \par 56. What is the percentage of water (by mass) in Hg}{\sub 2}{SO}{\sub 4}{\bullet 3H}{\sub 2}{O? \par }\pard\plain \s15\ql \li0\ri0\sl-232\slmult0\nowidctlpar\tqdec\tx209\tqdec\tx498\tqdec\tx5040\tqdec\tx8197\faauto\rin0\lin0\itap0 \fs20\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {\fs24 1) 3.3% 2) 4.2% 3) 9.8% 4) 15.4% 5) 30.8% \par }\pard\plain \ql \li0\ri0\nowidctlpar\tqdec\tx209\tqdec\tx498\tqdec\tx5040\tqdec\tx8197\faauto\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {ANS: 3 \par \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {57. The compound which contains 60% oxygen by weight is \par }\pard \ql \fi-351\li351\ri0\nowidctlpar\tx351\faauto\rin0\lin351\itap0 { 1) CO; 2) CO}{\sub 2}{; 3) Na}{\sub 2}{O}{\sub 2}{;}{\sub }{4) SO}{\sub 3}{; 5) none of these.\tab \par }\pard \ql \fi-362\li362\ri0\sl-243\slmult0\nowidctlpar\tx351\faauto\rin0\lin362\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx1116\tx1394\tqdec\tx3458\tqdec\tx4903\tx5493\faauto\rin0\lin0\itap0 { \par }\pard \ql \li0\ri0\sl-232\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {58. Calculate the percent of nitrogen in ammonium nitrite, NH}{\sub 4}{NO}{\sub 2}{. \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx1116\tqdec\tx1485\tqdec\tx3033\tqdec\tx4586\tqdec\tx6701\tx7177\faauto\rin0\lin0\itap0 { 1) 22.0% 2) 33.0% 3) 44.0% 4) 52.0%; 5) none of these \par ANS: 3 \par \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {59. What is the percentage of water (by mass) in A1PO}{\sub 4}{\b\super .}{2H}{\sub 2}{O? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx1116\tqdec\tx1485\tqdec\tx3033\tqdec\tx4586\tx5493\faauto\rin0\lin0\itap0 { 1) 14.1% 2) 22.8% 3) 25.3% 4) 29.5% \par ANS: 2 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx209\tqdec\tx606\tqdec\tx1893\faauto\rin0\lin0\itap0 { \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {60. In the formula Na}{\sub 2}{CO}{\sub 3}{\b\super .}{10 H}{\sub 2}{O, the element which makes up the largest percentage by \par mass is 1) Na; 2) C; 3) H; 4) O. \par ANS: 4 \par \par 61. What is the mass percentage of sulfur in sulfur dioxide, SO}{\sub 2}{? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx317\tqdec\tx799\tqdec\tx2239\tqdec\tx3514\tqdec\tx4750\tqdec\tx5992\tx8640\faauto\rin0\lin0\itap0 { 1) 16% 2) 32% 3) 33% 4) 50% 5) 66% \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 62. Which expression gives the percentage by mass of oxygen in water, H}{\sub 2}{O? \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { 1) (1/8) x 100 3) (16.0/18.0) x 100\line 2) (2/3) x 100 4) (18.0/16.0) x 100 5) (1/9) x 100 \par ANS: 3 \par \par 63. Find the percent of hydrogen in ferric hydroxide. \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx969\tqdec\tx1326\tx2449\tx4206\tx5799\faauto\rin0\lin0\itap0 { 1) 2.2 % 2) 2.8 % 3) 4.0 % 4) 6.7 % \par ANS: 2 \par }\pard \ql \fi-805\li805\ri0\sl-283\slmult0\nowidctlpar\tx805\tx2987\faauto\rin0\lin805\itap0 { \par 64. The compound which contains 50% of each element by mass is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx969\tx1224\tqdec\tx3361\tqdec\tx4750\faauto\rin0\lin0\itap0 { 1) CO; 2) CO}{\sub 2}{; 3) Na}{\sub 2}{O}{\sub 2}{; 4) CuO}{\sub 2}{; 5) SO}{\sub 2}{ . \par ANS: 5 \par \par 65. Calculate the percent of water (by mass) found in Na}{\sub 2}{CO}{\sub 3}{\b\super .}{3H}{\sub 2}{O. \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx969\tqdec\tx1326\tqdec\tx2982\tqdec\tx4626\tx5799\faauto\rin0\lin0\itap0 { 1) 17.2% 2) 22.2% 3) 33.8% 4) 50.9% \par ANS: 3 \par \par 66. What is the percent of phosphorus in calcium phosphate? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx799\tqdec\tx1326\tx2449\tx4206\tx6071\faauto\rin0\lin0\itap0 { 1) 20.0 % 2) 22.9 % 3) 27.7 % 4) 32.3 % \par ANS: 1 \par \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {67. Find the percentage of water (by mass) in Ca(C1O}{\sub 3}{)}{\sub 2}{\b\super .}{H}{\sub 2}{O. \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx198\tqdec\tx464\tqdec\tx1989\faauto\rin0\lin0\itap0 { 1) 7.9% 2) 12.7% 3) 14.8% 4) 18.1% \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 1 \par \par 68. What is the percentage of titanium by mass in titanium tetrachloride, TiCl}{\sub 4}{? \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tqdec\tx317\tqdec\tx799\tqdec\tx4750\tqdec\tx8719\faauto\rin0\lin0\itap0 { 1) 18.7% 2) 20.0% 3) 25.2% 4) 34.8% \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 69. Which of these compounds contains the greatest percent by mass of nitrogen? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx192\tx379\tx4098\faauto\rin0\lin0\itap0 {\tab 1) NO 2) NO}{\sub 2 }{3) N}{\sub 2}{O}{\sub 4 }{4) N}{\sub 2}{O 5) HNO}{\sub 3 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 70. In the formula Ca(HCO}{\sub 3}{)}{\sub 2}{ the element which makes up the }{\b largest}{ percentage by \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 { mass is 1) Ca; 2) H; 3) C; 4) O; 5) Ca and C are equal. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par \par 71. The compound with the highest percentage by mass of nitrogen is \par 1) NH}{\sub 4}{C1; 2) (NH}{\sub 4}{)}{\sub 2}{SO}{\sub 4}{; 3) NH}{\sub 3}{; 4) NH}{\sub 4}{NO}{\sub 3}{. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 72. Any given }{\b masses}{ of oxygen and sulfur which have the same number of atoms \par are in the ratio of\tab l) 1}{\b :}{2; 2) 2}{\b :}{1; 3) 16}{\b :}{1; 4) 1}{\b :}{32. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 1 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 73. The percentage of carbon in sodium hydrogen carbonate is \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx232\tqdec\tx589\tqdec\tx2341\tqdec\tx4042\tqdec\tx5742\faauto\rin0\lin0\itap0 { 1) 14.3%; 2) 27.4%; 3) 57.2%; 4) 61.4%; 5) 83.3%. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 1 \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 74. Find the percentage of oxygen in chromic oxide.}{\b \par }\pard \ql \li0\ri0\sl-249\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { 1) 31.6% 2) 15.8% 3) 42.3% 4) 6.71% 5) 56.2% \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 1 \par }\pard \ql \li0\ri0\nowidctlpar\tx-90\faauto\rin0\lin0\itap0 { \par 75. What is the percentage by mass of magnesium in magnesium nitride, Mg}{\sub 3}{N}{\sub 2 }{? \par }\pard \ql \li0\ri0\sl-238\slmult0\nowidctlpar\tqdec\tx895\tqdec\tx1457\tqdec\tx5669\tqdec\tx9490\faauto\rin0\lin0\itap0 { 1) 100 %\tab 2) 72 % 3) 60 % 4) 28% 5) 13% \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 2 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 76. A 6.3 gram sample of a hydrate was heated until the water of hydration was driven off. \par The anhydrous compound had a mass of 4.8 grams. What was the percent of water \par (by mass) in the hydrate? \par 1) 23.8% 2) 31.3% 3) 39.4% 4) 76.2% 5) 107.1% \par ANS: 1 \par \par 77. A 60 gram sample of LiCl}{\b\super .}{H}{\sub 2}{O is heated in an open crucible until all of the water \par has been driven off. What is the total mass of LiCl remaining in the crucible? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx396\tx572\tx2080\tx4053\tx5975\faauto\rin0\lin0\itap0 { 1) 18 grams 2) 24 grams 3) 42 grams 4) 60 grams \par ANS: 3}{\i \par }\pard \ql \li0\ri0\nowidctlpar\tx1213\faauto\rin0\lin0\itap0 { \par }\pard \qj \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {78. If 13.1 grams of a hydrate were completely heated, all the water of hydration can \par be driven off. If the anhydrous sample weighed 11.8 grams, what was the percent \par }\pard \qj \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 { of water in the hydrate? 1) 1.3% 2) 9.9% 3) 11.0% 4) 90.1% \par }\pard \qj \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 2 \par \par }\pard \qj \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {79. When 27.6 grams of a hydrate were completely heated, the anhydrous sample had a \par }\pard \qj \li0\ri0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 { mass of 16.3 grams. What was the percent of water in the hydrate? \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx192\tqdec\tx600\tqdec\tx2188\tqdec\tx3940\tqdec\tx5601\faauto\rin0\lin0\itap0 { 1) 69.3% 2) 59.1% 3) 40.9% 4) 11.3% \par ANS: 3 \par \par 80. A 4.4 gram sample of a hydrate was heated until the water of hydration was driven off. \par The anhydrous compound had a mass of 3.3 grams. What is the percentage by mass of \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx3855\tqdec\tx5238\tqdec\tx6559\tqdec\tx7755\faauto\rin0\lin0\itap0 { water in the hydrate? 1) 25% 2) 33% 3) 67% 4) 75% \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 1 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 81. A 9.7 gram sample of a hydrate was heated until the water of hydration was driven off. \par The anhydrous sample had a mass of 7.2 grams. What was the percent of water in the \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx1989\tqdec\tx3514\tqdec\tx5130\tqdec\tx6746\faauto\rin0\lin0\itap0 { hydrate? 1) 25.8% 2) 34.7% 3) 74.2% 4) 134.7% \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 1 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 82. In an experiment, a student found that the percent of oxygen in a sample of KC1O}{\sub 3 \par }{ was 41.3%. If the accepted value is 39.3%, the experimental percent error is \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { 1) [(41.3 \endash 39.3)/39.3] x 100; 2) [39.3/41.3] x 100; 3) [2/41.3] x 100; \par 4) [41.3/39.3] x 100. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 1 \par }\pard\plain \s17\ql \fi-270\li270\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin270\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 { \par 83. An ion is an atom or group of atoms which is 1) electrically neutral; 2) electro\-statically charged; 3) always negative; 4) always positive. \par }\pard\plain \ql \li0\ri0\sl-249\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {ANS: 2 \par \par 84. The symbol Ag}{\super +}{ represents one 1) atom of argon; }{\b \par }{ 2) ion of argon; 3) atom of silver; 4) ion of silver; 5) none of these. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 {ANS: 4 \par \par 85. The symbol Fe}{\super +3 }{represents 1) three ions of iron; 2) one ion of lead; \par 3) one atom of iron; 4) one ion of fluorine; 5) none of these. \par ANS: 5 \par \par 86. Sulfate, SO}{\sub 4}{\super -2}{, is 1) an acid; 2) a compound; 3) a radical; 4) a salt. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 3 \par \par 87. The chlorine atom and the chloride ion have the same 1) nuclear charge; \par 2) number of electrons; 3) chemical properties; 4) oxidizing ability. \par }\pard \ql \li0\ri0\nowidctlpar\tx283\tx8640\faauto\rin0\lin0\itap0 {ANS: 1 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 88. A Bunsen burner that is not properly adjusted produces a flame that is orange-yellow \par in color and is sooty. The probable cause of this condition is that \par 1) no oxygen is mixing with the gas. 3) insufficient oxygen is mixing with the gas. \par 2) no gas is mixing with the oxygen. 4) insufficient gas is mixing with the oxygen.\tab \par }\pard \ql \li0\ri0\nowidctlpar\tx283\faauto\rin0\lin0\itap0 {ANS: 3 \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par 89. The hottest part of the Bunsen flame is located at 1) the tip of the outer cone; \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin0\itap0 { 2) just above the tip of the inner cone; 3) in the reducing flame; 4) inside \par the inner cone; 5) above the tip of the outer cone. \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 2 \par }\pard\plain \s17\ql \fi-270\li270\ri0\sl-243\slmult0\nowidctlpar\tx204\tx8640\faauto\rin0\lin270\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 { \par 90. The hottest part of a Bunsen flame is 1) just above the outer cone; 2) at the top of the outer cone; 3) in the inner cone; 4) just above \par the inner cone. \par }\pard\plain \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {ANS: 4 \par \par 91. Heating a crystal of blue copper sulfate yields \par }\pard \ql \li0\ri0\nowidctlpar\tx187\tx8640\faauto\rin0\lin0\itap0 { 1) a basic anhydride; 2) a hydrate; 3) sulfur; 4) a white powder; \par 5) blue fumes. \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 4 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx175\tqdec\tx697\faauto\rin0\lin0\itap0 {\tab \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx8679\faauto\rin0\lin0\itap0 {92. The process that produces an anhydrous substance can be reversed by: \par 1) taking out water; 2) adding water; 3) heating the substance; \par 4) none of the above. \par }\pard \ql \li0\ri0\nowidctlpar\tx8679\faauto\rin0\lin0\itap0 {ANS: 2 \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx8407\tqdec\tx9025\faauto\rin0\lin0\itap0 {\tab \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {93. Water of hydration is driven off from a crystal by 1) dissolving the crystal; \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx198\tx323\tx3248\faauto\rin0\lin0\itap0 { 2) heating the crystal; 3) adding an acid; 4) filtration. \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 {ANS: 2 \par \par 94. A formula representing a hydrate is \par 1) H}{\sub 2}{O}{\sub 2}{; }{\sub }{2) BaCl}{\sub 2}{\bullet 2H}{\sub 2}{O; 3) NaOH; 4) H}{\sub 2}{SO}{\sub 4}{. \par }\pard \ql \li0\ri0\nowidctlpar\tx323\tqdec\tx7097\tx7336\tqdec\tx7988\tqdec\tx8407\tx8640\tqdec\tx9025\tqdec\tx9320\faauto\rin0\lin0\itap0 {ANS: 2 \par }\pard \ql \li0\ri0\nowidctlpar\tx3112\faauto\rin0\lin0\itap0 { \par }\pard\plain \s17\ql \fi-270\li270\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin270\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {95. A chemical balance is calibrated to measure 1) cubic centimeters; 2) liters; 3) millimeters; 4) ounces; \par 5) grams. \par }\pard\plain \ql \li0\ri0\nowidctlpar\tqdec\tx198\tx323\tx2165\tx3736\faauto\rin0\lin0\itap0 \fs24\lang1033\langfe1033\cgrid\langnp1033\langfenp1033 {ANS: 5\tab \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx5646\tqdec\tx7097\tqdec\tx8407\tqdec\tx9564\faauto\rin0\lin0\itap0 { \par }\pard \ql \li0\ri0\nowidctlpar\tx1434\tx2142\faauto\rin0\lin0\itap0 {\tab \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx8923\tqr\tx9983\faauto\rin0\lin0\itap0 {\tab \par }\pard \ql \li0\ri0\sl-243\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par \par \par \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx7035\tx7205\faauto\rin0\lin0\itap0 { \par }\pard \ql \li0\ri0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par }\pard \ql \li0\ri0\sl-249\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx8985\tqdec\tx9416\faauto\rin0\lin0\itap0 { \par \par }\pard \ql \li0\ri0\sl-249\slmult0\nowidctlpar\tx204\faauto\rin0\lin0\itap0 { \par \par }\pard \ql \li0\ri0\sl-238\slmult0\nowidctlpar\tqdec\tx895\tqdec\tx1457\tqdec\tx5669\tqdec\tx9490\faauto\rin0\lin0\itap0 { \par \par }\pard \ql \li0\ri0\nowidctlpar\tx833\tx1196\tqdec\tx4977\tqdec\tx8764\faauto\rin0\lin0\itap0 { \par \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx192\tx379\tx4098\faauto\rin0\lin0\itap0 { \par }{\sub \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx895\tqdec\tx1252\tqdec\tx5221\faauto\rin0\lin0\itap0 {\tab \par }\pard \ql \li0\ri0\nowidctlpar\tqdec\tx192\tqdec\tx566\faauto\rin0\lin0\itap0 {\tab \par }}