EXAM 1 F2008 - Name EXAM 1 Fall 2008 ( Page 1 of 9) Name_...

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Name___________________________________________________ Lab Sec. # ____; TA: ______________; Lab day/time: ___________ Andreas Toupadakis, Ph.D. Fall 2008 CHEMISTRY 2A Section D EXAM 1 (circle one ) Instructions: CLOSED BOOK EXAM ! No books, notes, or additional scrap paper are permitted. All information required is contained on the exam. Place all work in the space provided. If you require additional space, use the back of the exam. A scientific calculator may be used (if it is a programmable calculator, its memory must be cleared before the exam). (1) Read each question carefully. Exam has 9 pages total. (2) For problems 1-9 and 10-15, there is no partial credit given and only answers marked on this cover page will be graded . (3) The last page contains a periodic table and some useful information. You may remove it for easy access. (4) If you finish early, RECHECK YOUR ANSWERS! (5) Apply significant figures rules for Part III for credit . U.C. Davis is an Honor Institution Possible Points Points # 1–9 (4 points each) / 36 # 10-15 (6 points each) / 36 # 16-17 (16 + 12 = 28 points) / 28 Total Score (100) / 100 1. a b c d e 2. a b c d e 3. a b c d e 4. a b c d e 5. a b c d e 6. a b c d e 7. a b c d e 8. a b c d e 9. Fill in the blanks 1-9 total points: 10. a b c d e 11. a b c d e 12. a b c d e 13. a b c d e 14. a b c d e 15. a b c d e 10-15 total points: Multiple Choice
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Name Fall 2008 (Page 2 of 9) EXAM 1 Part I: Multiple Choice, Concepts (4 points each) Select the best answer and enter your choice on the cover sheet – No partial credit 1. You have learned that the mass of the C-12 atom is 12 amu. This number has: a. 0 significant figures b. 2 significant figures c. as many significant figures as the number of stars in the sky d. infinite number of significant figures e. None of the above ©AT2008FALL 2. Chlorine is found in nature as two isotopes Cl-35 and Cl-37. The percent natural abundance of these isotopes was found to be: Cl-35 (75.53%) and Cl-37 (24.47%). It means that: a. In 100 g of chlorine there are 75.53 g of Cl-35 and 24.47 g of Cl-37 b. In 100 mol of chlorine there are 75.53 mol of Cl-35 and 24.47 mol of Cl-37 c. In 100 atoms of chlorine there are 75.53 atoms of Cl-35 and 24.47 atoms of Cl-37
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EXAM 1 F2008 - Name EXAM 1 Fall 2008 ( Page 1 of 9) Name_...

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