Homework 1-solutions - dewitt (aad777) Homework 1 sutcliffe...

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Unformatted text preview: dewitt (aad777) 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, hydrogen, nickel, gold, nitrogen 4. iron, mercury, nitrogen, gold, neon cor- rect 5. iron, mercury, nitrogen, silver, 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) NH 3 , CH 4 , and SO 2 III) Ar, Na, and Fe IV) P 4 , S 8 , and O 2 include only polyatomic compounds? 1. I and II only correct 2. I and IV only 3. II, III, and IV only 4. II and IV only 5. II and III only 6. III and IV only 7. None of these 8. I, II, and III only 9. I and III only 10. All of these 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 color of a solid 2. the hardness of a metal 3. the melting point of a pure substance 4. the ability to burn in air correct 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 481 ounces to kilograms. 1. 13.6 kg correct 2. 0.0733 kg 3. 66.3 kg 4. 6 . 63 10- 5 kg 5. 3490 kg 6. 0.0170 kg dewitt (aad777) Homework 1 sutcliffe (52380) 2 7. 17000 kg 8. 1 . 36 10 7 kg 9. 3 . 49 10 9 kg Explanation: 481 ounces 1 lb 16 oz 1 kg 2 . 205 lb = 13 . 6338 kg 005 10.0 points Which one has the largest VOLUME?...
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This note was uploaded on 10/20/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas at Austin.

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Homework 1-solutions - dewitt (aad777) Homework 1 sutcliffe...

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