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Unformatted text preview: Pickering, Tracey Prequiz 1 Due: Sep 11 2005, 6:00 pm Inst: McCord 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points Which of the following is a chemical property of sulfur? 1. dissolves in carbon disulfide 2. melts at 119 C 3. density of 2.07 g/ml 4. burns in air correct Explanation: Burning in air as opposed to melting or dis- solving shows a change it undergoes in chem- ical composition. Melting and dissolving are physical properties not chemical. 002 (part 1 of 1) 10 points Which of the following is an intensive prop- erty? 1. number of moles of molecules 2. mass 3. volume 4. density correct 5. weight Explanation: Intensive properties are independent of the amount of matter present. The density of a substance will be the same regardless of the size (large or small) of the sample. 003 (part 1 of 1) 10 points A pure substance composed of two or more elements chemically combined is 1. an atom....
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This note was uploaded on 06/23/2008 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas at Austin.
- Fall '07