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Unformatted text preview: chauhan (mmc2762) – Jan 19 HW – sparks – (51150) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. Preview sections 12.3-12.5 before next class. For a description of what I mean by ”preview”, see the headnote on the first home- work assignment. For numerical problems, see the Quest help page for instructions on how to enter these numbers. Be sure to note that Quest does NOT utilize significant figures for these prob- lems. You should carry quite a few numbers through your calculations all the way to the end. When you do round your final answer, always keep at least four digits and you should be safe from rounding yourself out of the cor- rect answer. Confused by the Quest scoring? See the help page for a description. Note that you do get multiple tries on most questions. 001 10.0 points The formula O 3 represents 1. a molecule, a compound, and a mixture. 2. an atom, an element, and a mixture. 3. an atom, a compound, and a pure sub- stance. 4. an atom, an element, and a pure sub- stance. 5. an atom, a compound, and a mixture. 6. a molecule, an element, and a mixture. 7. a molecule, an element, and a pure sub- stance. correct 8. a molecule, a compound, and a pure sub- stance. Explanation: O 3 is composed only of oxygen. It is the less common allotrope of the element oxygen....
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This note was uploaded on 04/03/2012 for the course CHEM 56920 taught by Professor Sparks during the Spring '12 term at University of Texas.
- Spring '12