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Unformatted text preview: pham (ntp94) 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. fluorine, hydrogen, nitrogen, gold, neon 3. iron, mercury, nitrogen, silver, neon 4. iron, mercury, nitrogen, gold, neon cor- rect 5. iron, hydrogen, nickel, gold, nitrogen 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) P 4 , S 8 , and O 2 II) Ar, Na, and Fe III) NH 3 , CH 4 , and SO 2 IV) H 2 O, CCl 2 F 2 , and CO 2 include only polyatomic compounds? 1. I and II only 2. II, III, and IV only 3. I and III only 4. All of these 5. II and III only 6. I, II, and III only 7. II and IV only 8. None of these 9. III and IV only correct 10. I 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 color of a solid 3. the ability to burn in air correct 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 766 ounces to kilograms. 1. 21.7 kg correct 2. 5 . 56 10 9 kg 3. 27000 kg 4. 2 . 17 10 7 kg 5. 0.000106 kg 6. 0.0460 kg pham (ntp94) Homework 1 Sutcliffe (52380) 2 7. 106 kg 8. 5560 kg 9. 0.0270 kg Explanation: 766 ounces 1 lb 16 oz 1 kg 2 . 205 lb = 21 . 712 kg 005 10.0 points Which one has the largest VOLUME?...
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- Spring '09