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Unformatted text preview: phung (rkp378) Homework 1 Sutcliffe (52380) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. READ THIS: Some of these questions are NUMERICAL, they have no choices. You get ten tries. DO NOT ROUND when you do these calculations, or you may well get marked wrong even if you are correct with the rounding. Enter the FINAL answer rounded to 4 or 5 sig figs. Example: 1.3541 NOT 1.4 This is just something you have to get used to with QUEST. You should enter the number in scientific notation if it is excessively small or large. 001 10.0 points Give the names for the symbols Fe, Hg, N, Au, and Ne (in that order). 1. fluorine, mercury, nickel, silver, neon 2. iron, mercury, nitrogen, silver, neon 3. iron, mercury, nitrogen, gold, neon cor- rect 4. iron, hydrogen, nickel, gold, nitrogen 5. fluorine, hydrogen, nitrogen, gold, neon Explanation: Fe is iron, Hg is mercury, N is nitrogen, Au is gold, and Ne is neon. 002 10.0 points Which of these lists I) H 2 O, CCl 2 F 2 , and CO 2 II) Ar, Na, and Fe III) NH 3 , CH 4 , and SO 2 IV) P 4 , S 8 , and O 2 include only polyatomic compounds? 1. All of these 2. I and III only correct 3. II and III only 4. I, II, and III only 5. II, III, and IV only 6. I and IV only 7. I and II only 8. None of these 9. III and IV only 10. II and IV only Explanation: Polyatomic compounds consist of molecules of more than one element. P 4 , S 8 , and O 2 are polyatomic elements. 003 10.0 points Which of the following is a chemical property? 1. the hardness of a metal 2. the ability to burn in air correct 3. the color of a solid 4. the melting point of a pure substance Explanation: Chemical properties are exhibited as mat- ter undergoes chemical changes. Burning in air involves a change in chemical composition and some of the oxygen in the air is used up. 004 10.0 points Note: 1kg = 2.205 lb. Convert 940 ounces to kilograms. 1. 26.6 kg correct 2. 0.0332 kg 3. 6820 kg 4. 2 . 66 10 7 kg 5. 0.000130 kg 6. 33200 kg phung (rkp378) Homework 1 Sutcliffe (52380) 2 7. 0.0375 kg 8. 130 kg 9. 6 . 82 10 9 kg Explanation: 940 ounces 1 lb 16 oz 1 kg 2 . 205 lb = 26 . 644 kg 005 10.0 points Which one has the largest VOLUME?...
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- Spring '09