hw 2 - Ansari, Usman Homework 2 Due: Sep 19 2007, 11:00 pm...

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Unformatted text preview: Ansari, Usman Homework 2 Due: Sep 19 2007, 11:00 pm Inst: Brodbelt 1 This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Brodbelt CH301 Due Sept. 19, 2007, 11:00 pm Chapter 12 material, Part I 001 (part 1 of 1) 10 points How many moles of electrons would there be in one mole of He 2+ ? 1. 2 mol 2. 4 mol 3. none 4. 1 mol 5. 0.5 mol 002 (part 1 of 1) 10 points The atomic weight of a newly discovered el- ement is 10.600 amu. It has two naturally occuring isotopes. One has a mass of 10.000 and a natural abundance of 70.000%. What is the isotopic mass of the other isotope? 1. 10.500 2. 11.500 3. 12.000 4. 11.000 5. 9.5000 6. 10.600 7. 10.000 8. 11.200 9. 9.0000 003 (part 1 of 1) 10 points How many protons and electrons are present in the Mg 2+ ion? 1. 10 protons, 10 electrons 2. 10 protons, 12 electrons 3. 10 protons, 14 electrons 4. 14 protons, 12 electrons 5. 12 protons, 14 electrons...
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hw 2 - Ansari, Usman Homework 2 Due: Sep 19 2007, 11:00 pm...

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