hw7 - ctt253 Homework 7 Sparks (53535) 1 This print-out...

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Unformatted text preview: ctt253 Homework 7 Sparks (53535) 1 This print-out should have 27 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Which has more molecules: a mole of CO 2 or a mole of H 2 ? 1. They both have the same number of molecules. 2. a mole of CO 2 3. a mole of H 2 4. It depends on the pressure and tempera- ture. 002 10.0 points Avogadros number is really big. If you had 6.02 10 23 dollars, and could spend it at $1 billion (10 9 ) per second for the rest of your life (lets say 80 years), approximately what percentage of your original money would you have left when you die? 1. 0% 2. 90% 3. 50% 4. 75% 5. 10% 6. 95% 7. 100% 003 10.0 points The total number of electrons in one mole of fluorine molecules is 1. 18.99 6 . 10 23 . 2. 9. 3. 9 6 . 10 23 . 4. 18 6 . 10 23 . 5. 18. 004 10.0 points What is the formula weight of chromium(III) nitrite? 1. 98.0 g/mol 2. 290.0 g/mol 3. 238.0 g/mol 4. 190.0 g/mol 5. 202.0 g/mol 005 10.0 points How many grams are in 0.250 moles of C 6 H 12 O 6 ? 1. 720 g 2. 45.0 g 3. 180 g 4. 90.0 g 006 10.0 points Which of the following would contain the largest number of atoms? 1. 1.00 gram of iron (Fe) 2. All contain the same number of atoms....
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hw7 - ctt253 Homework 7 Sparks (53535) 1 This print-out...

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