Test Bank for Chemistry: Molecular Nature of Matter, 7th Edition

Chapter 2 Elements, Compounds, and the Periodic Table Multiple Choice Questions Section 2.1 Difficulty Level: easy 1. All of the following are alkali metals except a. Sr b. Na c. Fr d. Cs e. Rb Answer: a Section 2.1 Difficulty Level: easy 2. Which element is a halogen? a. Te b. O c. Se d. Uuh e. I Answer: e Section 2.1 Difficulty Level: easy 3. Each statement accurately describes the noble gases except for which one? a. They were once known as the inert gases. b. He, Ne, Ar, Kr, Xe, Rn, and Uuo are part of the group. c. Their heavier elements do react with other elements. d. They belong to group VIIIA (or 18). e. They contain at least one metalloid. Answer: e 2-1 Section 2.1 Difficulty Level: easy 4. The transition metals take up ___ periods of the periodic table. a. 2 b. 3 c. 4 d. 1 e. 5 Answer: c Section 2.1 Difficulty Level: easy 5. In which family of elements does Ca belong? a. alkali metals b. alkaline earth metals c. halogens d. noble gases e. transition metals Answer: b Section 2.1 Difficulty Level: easy 6. The elements in a column of the periodic table are known as a. metalloids. b. a period. c. noble gases. d. a group. e. nonmetals. Answer: d 2-2 Section 2.1 Difficulty Level: easy 7. The elements in a row of the periodic table are known as a. metalloids. b. a period. c. noble gases. d. a group. e. nonmetals. Answer: b Section 2.1 Difficulty Level: easy 8. Which of these elements have the most chemical properties that are similar to sulfur? a. calcium b. oxygen c. phosphorus d. bromine e. nitrogen Answer: b Section 2.1 Difficulty Level: easy 9. Which of these elements have the most chemical properties that are similar to magnesium? a. calcium b. sodium c. aluminum d. iron e. cesium Answer: a 2-3 Section 2.1 Difficulty Level: easy 10. Which of these elements have the most chemical properties that are similar to silicon? a. aluminum b. phosphorus c. nitrogen d. silver e. germanium Answer: e Section 2.2 Difficulty Level: easy 11. Some elements have properties that lie between true metals and true nonmetals. These elements are known as: a. metals b. nonmetals c. halogens d. alkaline earth metals e. metalloids Answer: e Section 2.2 Difficulty Level: easy 12. Which metal is a liquid at room temperature (about 25oC)? a. hydrogen b. bromine c. tungsten d. mercury e. chromium Answer: d 2-4 Section 2.2 Difficulty Level: easy 13. Which compound is a gas at room temperature (about 25oC)? a. hydrogen b. bromine c. tungsten d. mercury e. chromium Answer: a Section 2.2 Difficulty Level: easy 14. Diamond and graphite are different forms of which element? a. sodium b. carbon c. mercury d. gold e. calcium Answer: b Section 2.2 Difficulty Level: medium 15. Which of the following is not a property of metals? a. They have a shine called a metallic luster. b. They are good conductors of electricity. c. They are generally poor conductors of heat. d. They can be rolled into thin sheets. e. Some metals are quite hard, while some are soft. Answer: c 2-5 Section 2.2 Difficulty Level: medium 16. Classify the following three elements as a metal, metalloid, or nonmetal: P, Si, Al. a. P, metal; Si, metalloid; Al, nonmetal b. P, metal; Al, metalloid; Si, nonmetal c. Al, metal; P, metalloid; Si, nonmetal d. Si, metal; Al, metalloid; P, nonmetal e. Al, metal; Si, metalloid; P, nonmetal Answer: e Section 2.2 Difficulty Level: medium 17. Classify the following three elements as a metal, metalloid, or nonmetal: Ti, S, Sb. a. Ti, metal; S, metalloid; Sb, nonmetal b. Sb, metal; S, metalloid; Ti, nonmetal c. S, metal; Sb, metalloid; Ti, nonmetal d. Sb, metal; Ti, metalloid; S, nonmetal e. Ti, metal; Sb, metalloid; S, nonmetal Answer: e Section 2.2 Difficulty Level: easy 18. Which of these element types are usually tend to be poor conductors of heat and electricity? a. metals b. metalloids c. nonmetals d. alkaline earth metals e. alkali metals Answer: c 2-6 Section 2.3 Difficulty Level: easy 19. Which of the following is used to represent elemental bromine? a. Be b. B c. 2Br d. Br2 e. Br Answer: d Section 2.3 Difficulty Level: medium 20. Which combination is used to represent molecular hydrogen, and atomic hydrogen, respectively? a. H2, H b. He, Hc. H, H d. 2H, H+ e. Hy, H Answer: a Section 2.3 Difficulty Level: medium 21. Which compound exists as a diatomic molecule in the free state? a. magnesium b. managanese c. silicon d. arsenic e. chlorine Answer: e 2-7 Section 2.3 Difficulty Level: medium 22. Which compound exists as a diatomic molecule in the free state? a. C b. N c. Ga d. Ge e. P Answer: b Section 2.3 Difficulty Level: medium 23. Which compound exists as a diatomic molecule in the free state? a. helium b. fluorine c. neon d. argon e. xenon Answer: b Section 2.3 Difficulty Level: medium 24. Which compound is correctly represented as a hydrate? a. C2H5OH2+ b. MgSO4·7H2O c. FeH2(CO)4 d. O2S(OH)2 e. [CrCl(H2O)5]Cl Answer: b Section 2.3 Difficulty Level: medium 25. Which compound is correctly represented as a hydrate? a. CuSO4·5H2O b. HC2H3O2 c. O2S(OH)2 d. H2S2O7 e. C6(H2O)6 Answer: a 2-8 Section 2.4 Difficulty Level: medium 26. How many oxygen atoms are in one molecule of Mg(NO3)2? a. 1 b. 2 c. 3 d. 5 e. 6 Answer: e Section 2.4 Difficulty Level: medium 27. How many oxygen atoms are in one formula unit of Mg(NO3)2? a. 1 b. 2 c. 3 d. 5 e. 6 Answer: e Section 2.4 Difficulty Level: easy 28. How many hydrogen atoms are in one molecule of HC2H3O2? a. 1 b. 2 c. 3 d. 4 e. 5 Answer: d Section 2.4 Difficulty Level: easy 29. How many carbon atoms are in one molecule of C6H6? a. 1 b. 2 c. 4 d. 6 e. 12 Answer: d 2-9 Section 2.4 Difficulty Level: medium 30. The number of atoms in one formula unit of the substance, CO(NH2)2, is a. 4 b. 5 c. 6 d. 7 e. 8 Answer: e Section 2.4 Difficulty Level: medium 31. The number of atoms in one formula unit of C2H4(COOH)2 is a. 10 b. 11 c. 12 d. 14 e. 16 Answer: d Section 2.4 Difficulty Level: medium 32. The number of atoms in one formula unit of the substance Cs2SO4·5H2O is a. 4 b. 17 c. 22 d. 25 e. 33 Answer: c Section 2.4 Difficulty Level: hard 33. How many oxygen atoms are in one formula unit of Cu(NO3)2·5H2O? a. 2 b. 3 c. 5 d. 6 e. 11 Answer: e 2-10 Section 2.4 Difficulty Level: medium 34. The number of atoms in one formula unit of the substance (NH4)3Co(CN)6 is a. 21 b. 26 c. 28 d. 31 e. 33 Answer: c Section 2.4 Difficulty Level: medium 35. How many atoms are there in one formula unit of (NH4)4Fe(CN)6? a. 15 b. 25 c. 28 d. 33 e. 35 Answer: d Section 2.4 Difficulty Level: medium 36. How many atoms are there in one formula unit of NiSO47H2O? a. 9 b. 14 c. 27 d. 28 e. 33 Answer: c 2-11 Section 2.4 Difficulty Level: medium 37. How many atoms of each element are in the formula, H2S2O7? a. 2H, 2S, 7O b. 1H, 2S, 4O c. 2H, 1S, 1O d. 2H, 4S, 4O e. 1H, 1S, 1O Answer: a Section 2.4 Difficulty Level: medium 38. How many atoms of each element are in the formula, Ni(ClO4)2? a. 2Ni, 1Cl, 4O b. 1Ni, 2 Cl, 8O c. 2Ni, 1 Cl, 1O d. 2Ni, 4 Cl, 4O e. 1Ni, 1 Cl, 8O Answer: b Section 2.4 Difficulty Level: medium 39. How many hydrogen atoms appear on the right side of the equation, 4NH3 + 3O2 → 2N2 + 6H2O? a. 2 b. 4 c. 6 d. 10 e. 12 Answer: e Section 2.4 Difficulty Level: hard 40. How many atoms are in one molecule of Mo2(O2CC(CH3)3)4? a. 17 b. 30 c. 60 d. 66 e. 64 Answer: d 2-12 Section 2.4 Difficulty Level: hard 41. How many atoms of each element appear on each side of the arrow in the following chemical equation? 2Fe(NO3)3 + 3Na2CO3 → Fe2(CO3)3 + 6NaNO3 a. 2Fe, 6N, 18O, 6Na, 3C b. 2Fe, 6N, 27O, 6Na, 9C c. 2Fe, 6N, 27O, 6Na, 3C d. 2Fe, 6N, 27O, 9Na, 3C e. 2Fe, 6N, 21O, 18Na, 3C Answer: c Section 2.4 Difficulty Level: hard 42. How many atoms of each element appear on each side of the arrow in the following chemical equation? 3Cl3BNH2CH3 + 6(CH3)3N → 6(CH3)3NHCl + B3N3Cl3(CH3)3 a. 9Cl, 3B, 9N, 54H, 6C b. 9Cl, 3B, 9N, 69H, 21C c. 3Cl, 3B, 9N, 15H, 21C d. 9Cl, 1B, 9N, 54H, 9C e. 3Cl, 3B, 9N, 69H, 18C Answer: b Section 2.4 Difficulty Level: hard 43. A student attempts to balance a chemical equation and comes up with the following result: 8KClO3 + C12H22O10 → 8KCl + 12CO2 + 11H2O Turns out he wrote the initial equation wrong so he could not balance the equation. Which element(s) are not balanced in this result? a. Cl b. O c. H d. O and H e. C Answer: b 2-13 Section 2.5 Difficulty Level: easy 44. Which of these pairs of elements would be most likely to form an ionic compound? a. P and Br b. Cu and K c. C and O d. O and Zn e. Al and Rb Answer: d Difficulty Level: easy 45. Which of these pairs of elements would be most likely to form a molecular compound? a. P and Br b. Cu and K c. K and O d. O and Zn e. Al and Rb Answer: a Section 2.5 Difficulty Level: easy 46. The formula for the phosphate ion is a. PO42b. PO43c. PO4d. P2O4e. P2O42Answer: b Section 2.5 Difficulty Level: easy 47. The correct formula for the carbonate ion is a. C2H3O2b. C2O42c. CO2d. CO3e. CO32Answer: e 2-14 Section 2.5 Difficulty Level: medium 48. When barium metal reacts with chlorine gas, it forms an ionic compound, BaCl2. In the course of the reaction, each Ba atom a. loses two protons b. loses two electrons c. gains two protons d. gains two electrons e. loses two neutrons Answer: b Section 2.5 Difficulty Level: medium 49. When barium metal reacts with chlorine gas, it forms an ionic compound, BaCl2. In the course of the reaction, each Cl atom a. loses one proton b. loses one electron c. gains one proton d. gains one electron e. loses one neutron Answer: d Section 2.5 Difficulty Level: medium 50. Write the formula for the ionic compound formed from magnesium and sulfur. a. MgS2 b. MgS c. Mg2S d. Mg3S2 e. MgS3 Answer: b 2-15 Section 2.5 Difficulty Level: medium 51. Write the most likely formula for the ionic compound formed from magnesium and phosphorus. a. MgP2 b. Mg3P c. Mg2P d. Mg3P2 e. MgP3 Answer: d Section 2.5 Difficulty Level: medium 52. Write the most likely formula for the ionic compound formed from calcium and selenium? a. CaSe b. Ca2Se c. CaSe2 d. Ca3Se e. CaSe3 Answer: a Difficulty Level: medium 53. Write the most likely formula for the ionic compound formed from magnesium and iodine? a. MgI b. Mg2I c. MgI2 d. MgI3 e. Mg3I Answer: c 2-16 Section 2.5 Difficulty Level: medium 54. An alkaline earth metal, which we will represent by the symbol X, reacts with a halogen, which we will represent by the symbol Q. What would be the formula of the resulting compound? a. XQ b. XQ2 c. XQ4 d. X2Q e. X4Q Answer: b Section 2.5 Difficulty Level: medium 55. Aluminum reacts with a second element, which we will represent by the symbol E, to form a compound whose formula is AlE3. Element E is most probably a. an actinide element. b. an alkali metal. c. a chalcogen. d. a halogen. e. a transition metal. Answer: d Section 32.5 Difficulty Level: medium 56. Aluminum reacts with another element, which we will represent by the symbol Gr, to form a compound whose formula is AlGr. Element Gr is most probably a. an actinide element. b. group 2A element. c. a chalcogen. d. group 5A element. e. a transition metal. Answer: d 2-17 Section 2.5 Difficulty Level: medium 57. Bromine reacts with a metal, which we will represent by the symbol M, to form a compound whose formula is M2Br. Element M is most probably a. a metalloid. b. group 2A element. c. a chalcogen. d. group 5A element. e. a metallic element not currently known. Answer: e Section 2.5 Difficulty Level: medium 58. Oxygen reacts with a metal, which we will represent by the symbol Wp, to form a compound whose formula is Wp2O. Element Wp is most probably a. a metalloid. b. group 2A element. c. a chalcogen. d. group 1A element. e. a metallic element not currently known. Answer: d Section 2.5 Difficulty Level: medium 59. Which formula is correct because it represents a known ionic compound? a. Li2Br b. Pb2I2 c. KBr2 d. Rb2Se4 e. Al2S3 Answer: e 2-18 Section 2.5 Difficulty Level: medium 60. Which formula is correct because it represents a known ionic compound? a. Be2Br4 b. Ca2I2 c. K2S d. Rb2Br e. Ca2S3 Answer: c Section 2.5 Difficulty Level: medium 61. Which formula is incorrect because it does not represent a known ionic compound? a. BeCl2 b. CaI2 c. K2S d. RbBr e. Ca2O3 Answer: e Section 2.5 Difficulty Level: medium 62. Which formula is incorrect because it does not represent an ionic compound written correctly? a. BaCl2 b. Al2F3 c. Na2O d. RbBr e. CaO Answer: b 2-19 Section 2.6 Difficulty Level: hard 63. Select the examples in which the formulas for the ionic compound are not written correctly (Or cannot exist as written). I. (NH4)2As II. CuO III. Mg(C2H3O)2 IV. Na3(HCO3)2 a. I only b. II and III c. III and IV d. I and IV e. I, II and IV Answer: d Section 2.5 Difficulty Level: medium 64. What is the formula for the oxalate ion? a. CO32b. C4O22c. C4O42d. C2O42e. C2H3O2Answer: d Section 2.5 Difficulty Level: medium 65. The formula of the compound formed from the calcium ion and acetate ion is a. CaC2H3O2 b. Ca2C2H3O2 c. Ca2(C2H3O2)4 d. Ca(C2H3O2) 2 e. Ca(C2H3O2) 3 Answer: d 2-20 Section 2.5 Difficulty Level: medium 66. Write the most likely formula for the ionic compound formed from calcium ions and nitrate ions? a. Ca3N2 b. Ca(NO3)2 c. Ca2NO3 d. Ca2NO2 e. Ca(NO2)2 Answer: b Section 2.5 Difficulty Level: medium 67. The formula of the compound formed from the strontium ion and chromate ion is a. SrCrO3 b. SrCrO4 c. Sr2CrO4 d. Sr(CrO4) 2 e. Sr2(CrO4) 3 Answer: b Section 2.5 Difficulty Level: medium 68. Which compound below has its formula written incorrectly? a. Al(H2PO4)3 b. Al(HCO3)3 c. Ca(HCO3)2 d. KHPO4 e. Ca(NO3)2 Answer: d 2-21 Section 2.5 Difficulty Level: medium 69. Which compound below has its formula written incorrectly? a. Al(H2CO3)3 b. Al(H2PO4)3 c. Ba(HCO3)2 d. KH2PO4 e. Ca(NO2)2 Answer: a Section 2.5 Difficulty Level: hard 70. How many protons, neutrons, and electrons are in the ion, 57Fe3+? a. 27 protons, 30 neutrons, and 30 electrons b. 26 protons, 31 neutrons, and 23 electrons c. 29 protons, 28 neutrons, and 26 electrons d. 26 protons, 31 neutrons, and 29 electrons e. 25 protons, 32 neutrons, and 22 electrons Answer: b Section 2.5 Difficulty Level: hard 71. How many protons, neutrons, and electrons are in the ion, 129Te2-? a. 52 protons, 77 neutrons, and 50 electrons b. 53 protons, 76 neutrons, and 55 electrons c. 52 protons, 77 neutrons, and 54 electrons d. 50 protons, 79 neutrons, and 52 electrons e. 51 protons, 78 neutrons, and 53 electrons Answer: c 2-22 Section 2.5 Difficulty Level: hard 72. How many protons, neutrons, and electrons are in the ion, 37Cl-? a. 37 protons, 18 neutrons, and 37 electrons b. 18 protons, 37 neutrons, and 17 electrons c. 17 protons, 20 neutrons, and 18 electrons d. 37 protons, 20 neutrons, and 18 electrons e. 17 protons, 17 neutrons, and 37 electrons Answer: c Section 2.5 Difficulty Level: hard 73. How many protons, neutrons, and electrons are in the cation of the compound, 55MnP? a. 25 protons, 30 neutrons, and 25 electrons b. 23 protons, 33 neutrons, and 28 electrons c. 28 protons, 27 neutrons, and 25 electrons d. 23 protons, 32 neutrons, and 26 electrons e. 25 protons, 30 neutrons, and 22 electrons Answer: e Section 2.5 Difficulty Level: hard 74. How many protons, neutrons, and electrons are in the anion of the compound, CrCl337? a. 17 protons, 20 neutrons, and 18 electrons b. 18 protons, 23 neutrons, and 21 electrons c. 21 protons, 21 neutrons, and 16 electrons d. 14 protons, 23 neutrons, and 17 electrons e. 17 protons, 17 neutrons, and 20 electrons Answer: a 2-23 Section 2.5 Difficulty Level: hard 75. List the ions, including the number of each type present in the compound, (NH4)3PO4. a. 4N3-, 12H+, PO42b. 3NH4+, 4PO43c. N3-, 12H+, P3- ; 4O2d. 3NH4+, PO43e. 4NH+, 3PO43Answer: d Section 2.5 Difficulty Level: hard 76. List the ions, including the number of each type present in the compound, Fe2(C2O4)3·2H2O. a. 2Fe3+, 6C4+, 12O2b. 3Fe4+, 2CO43- ; 2OHc. 3Fe2+, 3C2O42d. 3Fe4+, 2CO43- ; 2H2O2e. 2Fe3+, 3CO22- ; 2 H2O Answer: c Section 2.6 Difficulty Level: easy 77. Which compound below is correctly indicated as magnesium sulfate heptahydrate? a. CaSO4·2H2O b. MgSO4·7H2O c. CuSO4·5H2O d. CoCl2·6H2O e. MnSO4·2H2O Answer: b 2-24 Section 2.6 Difficulty Level: medium 78. The name of the compound Al(SO4)3 is a. there is no compound with that formula – it must be written incorrectly. b. aluminum sulfate c. aluminum trisulfate d. aluminum(III) sulfate e. aluminum sulfite Answer: a Section 2.6 Difficulty Level: medium 79. What is the name of the compound, V(NO3)3? a. vanadium trinitrate b. vanadium nitrite c. vanadium(III) nitrite d. vanadium nitrate e. vanadium(III) nitrate Answer: e Section 2.6 Difficulty Level: medium 80. What is the name for the compound, Ba(NO3)2? a. barium dinitrate b. barium dinitrite c. barium nitrate d. barium(II) nitrite e. barium(II) nitrate Answer: c 2-25 Section 2.6 Difficulty Level: medium 81. Which compound is correctly written as a hydride? a. CoCl2·6H2O b. HC2H3O2 c. NaOH d. CaH2 e. C6H12O6 Answer: d Section 2.6 Difficulty Level: medium 82. What is the name for the compound V2O5? a. divanadium pentoxide b. vanadic oxide c. vanadium(V) oxide d. vanadium(V) pentoxide e. vanadous oxide Answer: c Section 2.6 Difficulty Level: medium 83. What is the name for the compound NaCl3? a. sodium chlorate b. sodium chlorite c. sodium perchloride d. sodium trichloride e. There is no such compound. Answer: e 2-26 Section 2.6 Difficulty Level: medium 84. What is the name for the compound CuBr2? a. copper(I) bromide(II) b. copper(II) bromide c. copper(II) bromite d. copper dibromide e. cuprous bromide Answer: b Section 2.6 Difficulty Level: medium 85. What is the correct name for the compound Na2O? a. disodium oxide b. sodium oxide c. sodium(I) oxide d. sodium peroxide e. sodium superoxide Answer: b Section 2.6 Difficulty Level: medium 86. Which is the correct name for the compound FeBr3? a. ferrous bromide b. iron(III) bromide c. iron bromite d. iron tribromide e. iron tribromine Answer: b 2-27 Section 2.6 Difficulty Level: medium 87. What is the formula for the compound iron(II) sulfate? a. FeSO4 b. Fe(SO4)2 c. Fe2SO4 d. Fe2(SO4)3 e. Fe3(SO4)2 Answer: a Section 2.6 Difficulty Level: medium 88. Which is a correct name for the compound Hg2Cl2? a. dimercury dichloride b. mercuric chloride c. mercury(I) chloride d. mercury(II) dichloride e. there is no correct name, the formula should be HgCl Answer: c Section 2.6 Difficulty Level: medium 89. Which is a correct name for the compound CoF3? a. cobalt fluoride b. cobalt trifluoride c. cobalt(III) fluoride d. cobaltic trifluoride e. cobaltous fluoride Answer: c 2-28 Section 2.6 Difficulty Level: medium 90. A correct name for SnF4 is a. stannic tetrafluoride b. stannous fluoride c. stannous(IV) fluoride d. tin(IV) fluoride e. tin tetrafluoride Answer: d Section 2.6 Difficulty Level: medium 91. The correct formula for tin(II) nitrate is a. Sn(NO2)2 b. Sn(NO3)2 c. Sn(NO3)3 d. Sn(NO3)4 e. Sn2NO3 Answer: b Section 2.6 Difficulty Level: medium 92. What is the formula for magnesic perchlorate? a. MgClO3 b. Mg(ClO3)2 c. Mg2ClO3 d. MgO(ClO3)2 e. There is no such compound. Answer: e 2-29 Section 2.6 Difficulty Level: medium 93. What is the name for Na2Cr2O7? a. sodium chromium(VII)-ate b. sodium dichromate c. sodium dichromium heptaoxide d. sodium heptaoxochromate e. sodium perchromate Answer: b Section 2.6 Difficulty Level: medium 94. The compound Na2S2O3 is used extensively in photographic film processing. What is its chemical name? a. sodium bisulfite b. sodium disulfur trioxide c. sodium oxosulfate(IV) d. sodium thiosulfate e. sodium trioxosulfite Answer: d Section 2.6 Difficulty Level: medium 95. If the NtO42- ion is called nortonate, what is the correct name for the compound K2NtO4? a. dipotassium nortonium tetraoxide b. dipotassium nortonate c. potassium nortonate d. potassium(I) nortonate e. potassium(II) nortonate Answer: c 2-30 Section 2.6 Difficulty Level: medium 96. What is the name for Cu2SO3? a. copper(I) sulfite b. copper(II) sulfite c. copper thiosulfate d. cuprous sulfate e. dicopper sulfur trioxide Answer: a Section 2.6 Difficulty Level: medium 97. What is a correct name for the FeCrO4? a. iron(II) chromate b. iron dichromate c. iron(III) chromium tetraoxide d. iron monochromate e. ferrous chrome Answer: a Section 2.6 Difficulty Level: medium 98. What is the name for CuC2H3O2? a. copper(I) acetate b. carbon hydrocarbonate c. copper monocarbonate d. copper(I) oxalate e. dicarbon acetate Answer: a 2-31 Section 2.6 Difficulty Level: medium 99. What is a correct name for KHCr2O7? a. potassium bichromite b. potassium bichromate c. potassium dichromic acid d. potassium monohydrogen chromite e. potassium monohydrogen dichromate Answer: e Section 2.6 Difficulty Level: medium 100. What is the name for LiHPO4? a. lithium monohydrogen phosphate b. lithium hydrogen phosphoric acid c. lithium hydrogen phosphorus tetraoxide d. lithium monohydrogen phosphite e. There is no known ionic compound with that formula. Answer: e Section 2.6 Difficulty Level: medium 101. What is the name for Li2HPO4? a. lithium monohydrogen phosphate b. There is no compound with that formula. c. dilithium monohydrogen phosphate d. lithium hydrogen phosphorus tetraoxide e. lithium phosphoric acid Answer: a Section 2.6 Difficulty Level: medium 102. What is the name for CuHSO4? a. copper(I) hydrogen sulfate b. copper(II) bisulfate acid c. copper hydrogen sulfur tetraoxide d. copper hydrogen sulfate e. copper sulfuric acid Answer: a 2-32 Section 2.6 Difficulty Level: medium 103. Which compound is correctly indicated as cobalt(II) chloride hexahydrate? a. CoCl2·6H2O b. CaSO4·2H2O c. CuSO4·5H2O d. NiSO4·6H2O e. Na2CO3·10H2O Answer: a Section 2.6 Difficulty Level: hard 104. Which is a correct formula for mercury(I) phosphate? a. HgPO3 b. HgPO4 c. Hg3PO4 d. Hg2PO3 e. (Hg2)3(PO4)2 Answer: e Section 2.6 Difficulty Level: hard 105. Select the examples in which the formulas do not correctly match the names of the compounds indicated. I. Sodium thiosulfate Na2SO3 II. Barium oxalate BaC2O4 III. Iron(II) sulfate hexahydrate FeSO4·6H2O IV. Calcium phosphate Ca3PO4 a. II only b. II and III c. I, II and IV d. I and IV e. II, III and IV Answer: d 2-33 Section 2.6 Difficulty Level: hard 106. Select the examples in which the names do not correctly match the formulas of the compounds indicated. I. Fe2(CO3)3 II. Cr2(C2O4)3 III. Mg (C2H3O)2 IV. PbSO3 iron(III) carbonate chromium(III) oxalate magnesium hydrogencarbonate lead sulfate a. II only b. II and III c. III and IV d. I and IV e. I, II and IV Answer: c Section 2.6 Difficulty Level: hard 107. Select the examples in which the names do not correctly match the formulas of the compounds indicated. I. NaClO3 II. (NH4)2CO3 III. Cd(H2PO4)2 IV. KMnO4 Sodium chlorate Ammonium(I) carbonate Cadmium dihydrogen phosphate Potasium-manganese(VII) oxide a. II only b. II and IV c. III and IV d. I and IV e. I, II and IV Answer: b 2-34 Section 2.7 Difficulty Level: easy 108. Which compound is correctly classified as a hydrocarbon? a. C6H12O6 b. C8H16 c. HC2H3O2 d. NaHCl e. C2H5OH Answer: b Section 2.7 Difficulty Level: medium 109. One of the components of kerosene is an alkane with 16 carbon atoms. Which formula is an alkane? a. C16H12 b. C16H22 c. C16H32 d. C16H34 e. C16H40 Answer: d Section 2.7 Difficulty Level: medium 110. The common name for the compound, CH4, is a. carbon(IV) hydride b. carbon tetrahydride c. hydrocarbonate d. methane e. carbonic acid Answer: d 2-35 Section 2.7 Difficulty Level: medium 111. The common name for the compound, C2H6, is a. carbon hydride b. carbon hexahydride c. ethane d. methane e. propane Answer: c Section 2.7 Difficulty Level: medium 112. Which of the following is the correct formula for the hydrocarbon hexane? a. CH4 b. C2H4 c. CH6 d. C6H14 e. C2H5OH Answer: d Section 2.7 Difficulty Level: medium 113. Which compound is not a hydrocarbon? a. C6H12 b. C8H16 c. C2H6 d. C5H5N e. C3H6 Answer: d 2-36 Section 2.7 Difficulty Level: medium 114. The formula for the compound formed between arsenic (As) and hydrogen is a. AsH b. As2H c. AsH2 d. As3H e. AsH3 Answer: e Section 2.7 Difficulty Level: medium 115. The most likely formula for the compound formed between antimony and chlorine is a. SbCl b. SbCl2 c. SbCl3 d. SbCl4 e. SbCl6 Answer: c Section 2.8 Difficulty Level: easy 116. What is the name of the compound, HI(g)? a. hydriodic acid b. hydrogen monoiodide c. hydrogen iodide d. iodic acid e. monohydrogen monoiodide Answer: c 2-37 Section 2.8 Difficulty Level: medium 117. What is the name of the compound, IBr3? a. bromic iodide b. iodine bromate c. iodine tribromide d. iodine tribromine e. monoiodine tribromite Answer: c Section 2.8 Difficulty Level: medium 118. What is the name of the compound, S2Cl2? a. disulfur chlorate b. disulfur dichloride c. disulfur dichlorine d. sulfur(I) chloride e. sulfur(II) chlorine(II) Answer: b Section 2.8 Difficulty Level: medium 119. What is the name of the compound, HCN(g)? a. hydrocarbonitride b. hydrocyanic acid c. hydrogen carbonitride d. hydrogen cyanate e. hydrogen cyanide Answer: e 2-38 Section 2.8 Difficulty Level: medium 120. A typographical error on an exam produced the formula, P4Se7, in one of the questions. How would you name this compound? a. tetraphosphorus hexaselenide b. tetraphosphorus heptaselenide c. phosphorus heptaselenite d. phosphorus(IV) selenide e. phosphorus(VII) selenide Answer: b Section 2.8 Difficulty Level: hard 121. Select the examples in which the formulas do not correctly match the names of the compounds indicated. I. dichlorine heptoxide II. iodine heptafluoride III. dinitrogen difluoride IV. tetraarsenic hexoxide Cl2O6 I2F7 N2F2 As4O8 a. II only b. II and III c. I, II and IV d. I and IV e. II, III and IV Answer: c 2-39 Section 2.8 Difficulty Level: hard 122. Select the examples in which the names do not correctly match the formulas of the compounds indicated. I. PF5 II. N2O4 III. XeO4 IV. Cl2O5 potassium pentafluoride dinitrogen(IV) oxide xenon tetroxide dichlorine pentoxide a. II only b. II and III c. III and IV d. I and II e. I, II and IV Answer: d Section 2.8 Difficulty Level: medium 123. What is the name of the compound, N2O5(g)? a. nitrogen oxide b. dinitrogen tetroxide c. nitrogen pentoxide d. dinitrogen pentoxide e. trinitrogen pentoxide Answer: d Fill-in-the-Blank Questions Section 2.1 Difficulty Level: easy 124. The vertical columns in the periodic table are numbered sequentially, 1 through ______ using Arabic numerals. Answer: 18 Section 2.1 Difficulty Level: easy 125. Selenium is found in which group of the periodic table? ________ Answer: group VIA 2-40 Section 2.1 Difficulty Level: medium 126. The group 1 elements form compounds with oxygen that dissolve in water to give solutions that are strongly_______________. Answer: alkaline Section 2.2 Difficulty Level: easy 127. Which group of nonmetallic elements is called “inert” ?______________ Answer: noble gases Section 2.2 Difficulty Level: medium 128. Metalloids’ electrical conductivity tends to be lower than metals, but they can have higher conductivity than many metals when they are used in materials called ___________. Answer: semiconductors Section 2.2 Difficulty Level: medium 129. The symbol Te belongs to a metalloid in group ___________. Answer: VIA, 16 Section 2.2 Difficulty Level: medium 130. An element is found to have a high conductivity in its pure form, is malleable, and is ductile. Based on these properties this element would be best classified as ________________. Answer: metal Section 2.2 Difficulty Level: medium 131. An element is found to be a solid with low electrical conductivity but does conduct electricity. It also has a high density, is shiny, and also brittle, shattering when hit with a hammer. Based on these properties this element would be best classified as ________________. Answer: metalloid 2-41 Section 2.3 Difficulty Level: medium 132. Two atoms of nitrogen combine with one atom of oxygen to form one compound, whereas two atoms of nitrogen combine with five atoms of oxygen to form another compound. The ratio of the masses of oxygen in the two compounds must be________. Answer: 1/5 Section 2.3 Difficulty Level: medium 133. What formula is used to represent molecular chlorine? ______ Answer: Cl2 Section 2.3 Difficulty Level: easy 134. List the seven molecules that are the most stable form of their given element. Answer: H2, N2, O2, F2, Cl2, Br2, I2 Section 2.3 Difficulty Level: medium 135. To show how atoms are connected in certain compounds, the chemical symbols are used to represent the atoms, and dashes are used to indicate the chemical bonds. The resulting formula is therefore referred to as _____________. Answer: a structural formula Section 2.3 Difficulty Level: hard 136. Write the formula for the compound that has the atoms and, or groups in the order given: 3 Fe, and two groups made up of 1 As and 4 O. _____________ Answer: Fe3(AsO4)2 Section 2.3 Difficulty Level: hard 137. Write the formula for the hydrated compound that has the atoms and, or groups in the order given: 1 K, 1 Al, two groups of 1 S and 4 O, and twelve groups made up of 2 H and 1 O. _____________ Answer: KAl(SO4)2·12 H2O 2-42 Section 2.4 Difficulty Level: easy 138. List how many of each type of element are present in one molecule of sucrose, C12H22O11. _____________ Answer: 12 carbon, 22 hydrogen, 11 oxygen Section 2.4 Difficulty Level: easy 139. List how many oxygen atoms are present in one molecule of H3PO4. _____________ Answer: 4 Section 2.4 Difficulty Level: hard 140. List how many oxygen atoms are present in one formula unit of CoSO4·6H2O. _____________ Answer: 10 Section 2.4 Difficulty Level: medium 141. How many hydrogen atoms are present in the formula, (NH4)3PO4? ______ Answer: 12 Section 2.4 Difficulty Level: medium 142. How many hydrogen atoms appear on the reactant side of the equation, 4NH3 + 3O2 → 2N2 + 6H2O? ______ Answer: 12 Section 2.4 Difficulty Level: hard 143. How many of each type of atoms are needed on the left to balance the equation? ___ 3H2SO4 + ?? → Al2(SO4)3 + 6H2O Answer: 2Al, 6H, 6O 2-43 Section 2.4 Difficulty Level: hard 144. How many additional hydrogen atoms and oxygen atoms are required on the right side to balance the given equation? Ba(OH)2·8H2O + 2NH4NO3 → 2NH3 + H2O + Ba(NO3)2 ______ Answer: 18H, 9O Section 2.4 Difficulty Level: hard 145. What molecule is missing that would balance the given equation? 2AgBr + 2NaOH + C6H6O2 → 2Ag + ?? + 2NaBr + C6H4O2. Balance the equation by entering the correct coefficient and formula for the missing molecule.______ Answer: 2H2O Section 2.4 Difficulty Level: hard 146. What molecule is missing that would balance the given equation? 4Au + 8NaCN + ?? + 2H2O → 4NaAu(CN)2 + 4NaOH. If a coefficient other than one is needed provide the coefficient.______ Answer: O2 Section 2.4 Difficulty Level: medium 147. Balance the following equation: VCl3 + Na + CO → V(CO)6 + NaCl Answer: VCl3 + 3Na + 6CO → V(CO)6 + 3NaCl Section 2.4 Difficulty Level: medium 148. Balance the following equation: CoS + CO + Cu → Co2(CO)8 + Cu2S Answer: 2CoS + 8CO + 4Cu → Co2(CO)8 + 2Cu2S Section 2.5 Difficulty Level: easy 149. What is the charge on all the ions of metals of Group IIA? ______ Answer: 2+ 2-44 Section 2.5 Difficulty Level: easy 150. What is the charge on all the ions of non-metals of Group VIIA? ______ Answer: -1 Section 2.5 Difficulty Level: easy 151. What is the formula for the sulfide ion? ______ Answer: S2- Section 2.5 Difficulty Level: medium 152. How many protons and electrons are in the N3- ion? ______ Answer: 7 protons; 10 electrons Section 2.5 Difficulty Level: medium 153. How many protons and electrons are in the S2- ion? ______ Answer: 16 protons; 18 electrons Section 2.5 Difficulty Level: medium 154. How many protons and electrons are in the Ca2+ ion? ______ Answer: 20 protons; 18 electrons Section 2.5 Difficulty Level: medium 155. How many electrons are lost when aluminum forms a cation? ______ Answer: 3 Section 2.5 Difficulty Level: medium 156. How many electrons are lost when zinc forms a cation? ______ Answer: 2 2-45 Section 2.5 Difficulty Level: medium 157. How many electrons are gained when sulfur forms an anion? ______ Answer: 2 Section 2.5 Difficulty Level: medium 158. The correct formula for the compound formed from the lithium ion and PO43- is ______ . Answer: Li3PO4 Section 2.5 Difficulty Level: medium 159. The formula for the compound formed from the barium ion and SO32- is ______. Answer: BaSO3 Section 2.5 Difficulty Level: medium 160. The formula formed from the calcium ion and ClO2- is ______ . Answer: Ca(ClO2)2 Section 2.5 Difficulty Level: medium 161. What is the formula of the compound formed from Cr3+ and H2PO4-? ______ Answer: Cr(H2PO4)3 Section 2.5 Difficulty Level: medium 162. What is the formula of the compound formed from the calcium ion and HCO3-? ______ Answer: Ca(HCO3)2 Section 2.5 Difficulty Level: medium 163. What is the name of the following compound: (NH4)2SO4? _______ Answer: ammonium sulfate 2-46 Section 2.6 Difficulty Level: medium 164. What is the name of the following compound: Cr2(SO4)3? ___ Answer: chromium(III) sulfate Section 2.6 Difficulty Level: medium 165. What is the name of the following compound: V3(PO4)4? ____ Answer: vanadium(IV) phosphate Section 2.6 Difficulty Level: medium 166. What is the name of the following compound: Mn2O7? ____ Answer: manganese(VII) oxide Section 2.6 Difficulty Level: medium 167. What is the name of the following compound: NH4NO3? ____ Answer: ammonium nitrate Section 2.6 Difficulty Level: medium 168. What is the name of the following compound: Ba(OH)2? ____ Answer: barium hydroxide Section 2.6 Difficulty Level: medium 169. What is the name of the following compound: KHCO3? ____ Answer: potassium hydrogen carbonate or potassium bicarbonate Section 2.6 Difficulty Level: medium 170. What is the correct formula for lead(IV) chloride? ____ Answer: PbCl4 2-47 Section 2.6 Difficulty Level: medium 171. What is the correct formula for calcium phosphate? ____ Answer: Ca3(PO4)2 Section 2.6 Difficulty Level: medium 172. What is the correct formula for magnesium sulfate? ____ Answer: MgSO4 Section 2.6 Difficulty Level: medium 173. What is the correct formula for sodium sulfide? ____ Answer: Na2S Section 2.6 Difficulty Level: medium 174. What is the correct formula for chromium(VI) oxide? ____ Answer: CrO3 Section 2.7 Difficulty Level: medium 175. Predict the formula of the compound formed between sulfur and hydrogen ______. Answer: H2S Section 2.7 Difficulty Level: medium 176. Predict the formula of the compound formed between sulfur and hydrogen ______. Answer: H2S Section 2.7 Difficulty Level: medium 177. Hydrocarbons are organic compounds which have general formula ______ . Answer: CnH2n+2 2-48 Section 2.7 Difficulty Level: medium 178. Write the formula of the alkane hydrocarbon with seven carbon atoms____ . Answer: C7H16 Section 2.8 Difficulty Level: easy 179. What is the name for the compound PBr3? ______ Answer: phosphorus tribromide Section 2.8 Difficulty Level: easy 180. What is the name for the compound Si3N4? ______ Answer: trisilicon tetranitride Section 2.8 Difficulty Level: medium 181. The name for As4S10 is __________________________________. Answer: tetraarsenic decasulfide Section 2.8 Difficulty Level: medium 182. What is the formula for dichlorine heptoxide? Answer: Cl2O7 True and False Questions Section 2.1 Difficulty Level: medium 183. The alkali metals like sodium and potassium are soft metals, so they are unreactive towards water. ____ Answer: False 2-49 Section 2.1 Difficulty Level: medium 184. The number of protons in the nucleus of an atom, determines the order of elements in the periodic table. ____ Answer: True Section 2.1 Difficulty Level: medium 185. Due to their properties, and where they exist in nature, the group 2A metals are called the lanthanides. ____ Answer: False Section 2.1 Difficulty Level: medium 186. Elements that are part of the actinides are all composed of radioactive gases. ____ Answer: False Section 2.2 Difficulty Level: easy 187. Some of the nonmetals are solids at room temperature. ____ Answer: True Section 2.2 Difficulty Level: easy 188. Metalloids are capable of conducting an electric current. ____ Answer: True Section 2.2 Difficulty Level: easy 189. From left to right, across a row on the periodic table, there is a gradual change in properties from nonmetallic to metallic properties. ____ Answer: False 2-50 Section 2.2 Difficulty Level: easy 190. Metalloids tend to be malleable and ductile in nature. ____ Answer: False Section 2.3 Difficulty Level: easy 191. The formula, N2, is used to represent elemental nitrogen. ________ Answer: True Section 2.3 Difficulty Level: easy 192. When interpreting the formula, CO(NH2)2, it should be noted that the group of atoms within the parentheses, occurs twice. ________ Answer: True Section 2.3 Difficulty Level: medium 193. An important characteristic of a compound’s formula is it specifies the atomic composition of the compound. _____ Answer: True Section 2.4 Difficulty Level: easy 194. When iron and sulfur combine chemically, the properties of the resulting compound are similar to that of each of the elements. Answer: False Section 2.4 Difficulty Level: medium 195. Four molecules of the only product formed in the incomplete equation below are needed to ensure that the equation is balanced. P4O10 + 6H2O → ?? ___ Answer: True Section 2.5 Difficulty Level: easy 196. Ionic compounds are generally formed when metals react with nonmetals. ____ Answer: True 2-51 Section 2.5 Difficulty Level: medium 197. The phosphide ion has 18 electrons and 18 protons. ____ Answer: False Section 2.5 Difficulty Level: medium 198. The subscripts in the formulas do not normally produce an electrically neutral formula unit in ionic compounds. ____ Answer: False Section 2.6 Difficulty Level: easy 199. The name of MnCl3 is magnesium(III) chloride. ____ Answer: False Section 2.6 Difficulty Level: medium 200. It is important to specify how many cations and anions are present in ionic compounds. ____ Answer: False Section 2.6 Difficulty Level: medium 201. The formula for magnesium phosphide is Mg3P2. ____ Answer: True Section 2.7 Difficulty Level: easy 202. As a general rule, molecular compounds are formed when nonmetallic elements combine. _____ Answer: True Section 2.7 Difficulty Level: easy 203. The elements, carbon and oxygen, can combine to form only one compound. _____ Answer: False 2-52 Section 2.7 Difficulty Level: easy 204. Phosphorus can combine with hydrogen to form the compound, PH3. Answer: True Section 2.8 Difficulty Level: easy 205. The compound N2O4, is named nitrate tetraoxide. ___ Answer: False Section 2.8 Difficulty Level: easy 206. The name for ZnBr2, is zirconium bromide. ___ Answer: False Section 2.8 Difficulty Level: medium 207. A name for the compound P4Se10 is phosphorus(IV) selenium. ___ Answer: False Section 2.8 Difficulty Level: medium 208. A name for CrBr2, is chromic bromide. ___ Answer: False Section 2.8 Difficulty Level: medium 209. The name for RbClO4, is rubidium(I) perchlorate. ___ Answer: False Section 2.8 Difficulty Level: medium 210. A name for Ni(OCl)2 is nickel(II) hypochlorite. ___ Answer: True 2-53 ____ Section 2.8 Difficulty Level: medium 211. A name for the compound Mn(ClO4)2, is magnesium chlorate. ___ Answer: False Section 2.8 Difficulty Level: medium 212. The name for K2Cr2O7, is potassium dichromium heptaoxide. ___ Answer: False Critical Thinking Questions Section 2.3 Difficulty Level: medium 213. A compound is known to contain one C atom for each water molecule (H2O). If the compound has six carbon atoms, what is the general formula representing the compound? Answer: C6H12O6 Section 2.3 Difficulty Level: hard 214. How many silicon and oxygen atoms are in the formula, Ca3Mg5(Si4O11)2(OH)2 ? a. 3 Si, 5 O b. 8 Si, 24 O c. 4 Si, 11 O d. 2 Si, 2 O e. 5 Si, 3 O Answer: b 2-54 Section 2.3 Difficulty Level: hard 215. What is the total number of atoms represented by the following formula? Mg5Al(OH)8AlSi3O10 a. 36 b. 28 c. 8 d. 24 e. 42 Answer: a Section 2.3 Difficulty Level: hard 216. What is the total number of atoms represented by the following? 3Co(NO3)2 ·6H2O a. 35 b. 28 c. 8 d. 81 e. 42 Answer: d Section 2.3 Difficulty Level: hard 217. Through analysis it was found that an unknown molecule contains 19.8 g of nitrogen for every 65.0 g of the molecule. How many grams of nitrogen would 1.35 grams of the molecule contain? a. 0.305 g b. 3.28 g c. 0.411 g d. 0.0681 g e. 0.226 g Answer: c 2-55 Section 2.4 Difficulty Level: medium 218. What is the total number of atoms reacting in the chemical reaction below? 2C6H14 + 19O2 → 12CO2 + 14H2O a. 35 b. 82 c. 41 d. 78 e. 21 Answer: d Section 2.4 Difficulty Level: hard 219. How many hydrogen atoms are on the reactant side of the chemical equation below? 2(NH4)3PO4 + 3Ba(C2H3O2)2 → Ba3(PO4)2 + 6NH4C2H3O2 a. 35 b. 28 c. 8 d. 24 e. 42 Answer: e Section 2.4 Difficulty Level: hard 220. What single coefficient is needed to balance the following chemical equation? As2O3 + 6KI + 6HCl → 2AsI3 + 6KCl + H2O a. 2 b. 3 c. 4 d. 5 e. 6 Answer: b 2-56 Section 2.4 Difficulty Level: hard 221. What single coefficient is needed to balance the following chemical equation? C2H5OH + 3O2 → 2CO2 + H2O a. 2 b. 3 c. 4 d. 5 e. 6 Answer: b Section 2.4 Difficulty Level: hard 222. Write the formula of the single product in the reaction below, if its coefficient is 5. 3P4O10 + 2P4S10 → 5 ??? a. P6O6S5 b. P4O6S4 c. P4O16S6 d. P8O3S8 e. P12O3S10 Answer: b Section 2.5 Difficulty Level: hard 223. Two elements, Qr and E, combine to form an ionic compound whose formula is QrE2. Qr also combines with element Z to form an ionic compound, Qr3Z2. Based on this information, what is a reasonable value for the charge on E? (Assume that Qr has the same charge in both compounds.) a. 1+ b. 1c. 2+ d. 2e. 3Answer: b 2-57 Section 2.5 Difficulty Level: hard 224. Two elements, Qr and Z, combine to form an ionic compound containing simple ions whose formula is Qr2Z3. Calcium also combines with element Z to form an ionic compound containing simple ions whose formula is CaZ. Qr combines with a third element, E, to form an ionic compound containing simple ions whose formula is QrE3. Based on this information, what is a reasonable formula for the compound formed when magnesium combines with element E to form a simple ionic compound? (Assume that Qr has the same charge in both compounds.) a. MgE b. Mg2E c. MgE2 d. Mg2E3 e. Mg3E2 Answer: c Section 2.5 Difficulty Level: hard 225. Vitellium phosphate has the formula, Vi3(PO4)2, while sodium nortonate has the formula, Na2NtO4. Which of the following would be the expected formula for vitellium nortonate? (Imaginary elements are used in this question.) a. ViNtO4 b. Vi2NtO4 c. Vi(NtO4)2 d. Vi2(NtO4)3 e. Vi3(NtO4)2 Answer: a Section 2.5 Difficulty Level: hard 226. Engrium sulfate has the formula, En2(SO4)3, while sodium nortonite has the formula Na2NtO3. Based on these names and formulas, what would you expect for the formula of engrium nortonate? (Imaginary elements are used in this question.) a. EnNtO4 b. En2NtO4 c. En(NtO4)2 d. En2(NtO4)3 e. En3(NtO4)2 Answer: d 2-58 Section 2.6 Difficulty Level: medium 227. What is the name for the ionic compound CuH2CrO4? a. copper(I) hydrogen chromate b. copper(II) bichromic acid c. copper hydrogen chromate tetraoxide d. copper hydrogen sulfate e. There is no known ionic compound with this formula. Answer: e Section 2.6 Difficulty Level: medium 228. What is the formula for manganese(III) monohydrogen phosphate? a. MnHO4 b. MnHPO4 c. MnHPO3 d. Mn2(HPO4)3 e. Mn3HPO4 Answer: d Section 2.6 Difficulty Level: medium 229. What is the formula for cobalt(III) dihydrogen phosphate? a. Co3HPO4 b. Co2H(PO4)3 c. Co(H2PO4)3 d. Co(H2PO4)3 e. CoH3PO4 Answer: d Section 2.7 Difficulty Level: hard 230. What are the likely formulas of three different hydrocarbons each with 12 hydrogen atoms? a. C12H12; COH12 ; C5H12 b. C12H12; C7H12 ; CH12 c. C5H12; C6H12; C7H12 d. C12H12; C9H12 ; CH12 e. CH12; C12H12 ; C8H12 Answer: c 2-59 Section 2.7 Difficulty Level: hard 231. What are the likely formulas of three different hydrocarbons each with 5 carbon atoms? a. C5H2; C5H12 ; C5H14 b. C5H12; C5H10 ; C5H8 c. C5H12; C5H19; C5H11 d. C5H12; C5H19 ; C5H30 e. C5HO3; C5H12 ; C5H22 Answer: b Section 2.7 Difficulty Level: hard 232. Starting with the hydrocarbon, C6H14, what is the most likely formula of the alcohol formed from this hydrocarbon? a. C6H15(OH)2 b. C6HOH c. C5H14OH d. C6H13OH e. C5H12OH Answer: d Section 2.8 Difficulty Level: medium 233. What is the most likely name for BrF? a. bromine monofluoride b. bromine fluorine c. monobromide fluoride d. bromine difluorine e. bromide fluorine Answer: a Section 2.8 Difficulty Level: medium 234. What is the best name for the I2O5 molecule? a. diiodine pentoxide b. iodine pentoxygen c. pentoxygen iodide d. iodine dioxide e. diiodide oxide Answer: a 2-60 Section 2.8 Difficulty Level: medium 235. What is the most likely name for IF7? a. diiodine pentafluoride b. iodine heptafluoride c. pentafluorine iodide d. iodine fluoride e. diiodide hexafluoride Answer: b Section 2.8 Difficulty Level: medium 236. What is the formula for the compound named hydrogen sulfide? ____ Answer: H2S 2-61