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Unformatted text preview: markowitz (am45362) Postlab 1 Measurement lyon (51900) 1 This printout should have 28 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points Which of the following is an intensive prop erty? 1. density 2. volume 3. number of moles of molecules 4. weight 5. mass 002 10.0 points Which of the following is an extensive physical property? 1. color 2. density 3. reactivity 4. mass 003 10.0 points Calculate the density of copper, given that a 35 . 4 cm 3 block of the pure metal has a mass of 316 g. 1. . 112 g / cm 3 2. 1 . 00 g / cm 3 3. 1 . 12 10 4 g / cm 3 4. 8 . 93 g / cm 3 5. 8 . 94 10 5 g / cm 3 004 10.0 points Standard deviation is a measure of the scatter in the data. Does a small value for stan dard deviation indicate high precision or low precision? 1. Both 1 and 2. 2. Cannot determine from the information given. 3. high precision 4. low precision 005 (part 1 of 2) 10.0 points The rules of significant figures do not apply to the answers for part 1 or part 2 of this question. A chemist determined in a set of four ex periments that the density of a metal was 1 . 69 g / cm 3 , 1 . 66 g / cm 3 , 1 . 69 g / cm 3 , and 1 . 71 g / cm 3 . The accepted value for its density is 1 . 78 g / cm 3 . What is the standard deviation (precision) of this data?...
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 Spring '08
 leytner

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