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Unformatted text preview: KEY thelifecurve. com Last Name First Name _ Lab Sec. # __ ; TA: ; Lab day/time: _ Andreas Toupadakis, Ph.D. CHEMISTRY 2A Section A Good luck © EXAM 2 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). This exam has 10 pages. (1) Read each question carefully. (2) For Parts I and II, there is no partial credit given and only answers marked on this cover page will be graded. (3) The last 2 pages contain a periodic table and some useful information. You may remove them for easy access. (4) If you finish early, RECHECKYOUR ANSWERS! U.C. Davis is an Honor Institution Possible Points I Points # 1-9 (4 points each) /36 # 10-15 (6 points each) /36 # 16 (16 points) / 16 # 17 (8 points) / 08 # 18 (4 points) / 04 Total Score (100) I / 100 Winter 2010 Multiple Choice (circle one) 1. A B ®D E 2. A B @)D E 3. A B C@ E 4.0 B C D E 5. A B C @ E 6. A B C ® E 7. A B C @ E 8. A B@ D E 9. A @ C D E 1- 9 total points; 10. A @C D E 11. A B C D® 12. A B o D E 13.@ B C D· E 14.@ B C D E 15. A B © D E 10-15 total points; Toupadakis 2A Winter 2010 EXAM2 (Page 2 of 10) Part I: Multiple Choice, Concepts (4 points each) Select the best answer and enter your choice on the cover sheet- No partial credit 1) Which of the following combinations of reactants will yield a precipitate? @AT2010WINTER A. HN0 3 (aq) + NH3(aq) ~ B. NaOH(aq) + KCI(aq) ~ C. Ba(OHh(aq) + H 2 S0 4 (aq) ~ D. H'(oq) + OH-(aq) ~ E. HCI(aq) + LiOH(aq) ~ 2) As a weak electrolyte, NH 3 (g): A. when is dissolved in water it completely ionizes into NH 4 + ions. B. electricity goes through its aqueous solution and the intensity of a light bulb is very strong. C. when is dissolved in water it partially ionizes into NH 4 + ions. D. when is dissolved in water it produces a neutral solution. E. when is dissolved in water it produces an acidic solution. @AT201OWINTER 3) We say that a chemical species is reduced if there is: A. gain of oxygen B. loss of hydrogen C. loss of electrons D. an algebraic decrease of the oxidation number of one of its atoms. E. all of the above @AT201OWINTER 4) Which of the following mathematical expressions states Charles' law? A. V = kT B. V = kiP C. PV = nRT D. Vtotal =LVi E. Rote kiM'" I 5) What happens to the volume of a gas when both its pressure and mass doubles and its absolute temperature becomes three times larger? @AT201OWINTER A. doubles @AT201OWINTER B. decreases C. stays the same D. becomes 3 times larger E. becomesE....
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This note was uploaded on 03/24/2010 for the course CHEMISTRY chem 2a taught by Professor Dr.a.toupadakis during the Spring '10 term at UC Davis.
- Spring '10