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Unformatted text preview: scrushy (mgs972) Oct 11 HW sparks (50975) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. Preview 5.3-5.5 prior to next class. Dont forget that there are lots of extra practice problems on the webpage. 001 10.0 points Which has more molecules: a mole of CO 2 or a mole of H 2 ? 1. a mole of CO 2 2. They both have the same number of molecules. correct 3. It depends on the pressure and tempera- ture. 4. a mole of H 2 Explanation: 002 10.0 points Determine the limiting reactant if 50.0 g of NO are mixed with 30.0 g of O 2 according to the reaction 2 NO + O 2 2 NO 2 . 1. O 2 2. It is impossible to determine. 3. NO 2 4. NO correct 5. There is not a limiting reactant. Explanation: m NO = 50 . 0 g m O 2 = 30 . 0 g We recognize this as a limiting reactant problem because the amounts of more than one reactant are given. We must determine which of these would be used up first (the...
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This note was uploaded on 10/18/2011 for the course CHEMISTRY 301 taught by Professor Mccord during the Fall '10 term at University of Texas at Austin.
- Fall '10