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FinalExamV1SP05 - Chemistry 162 Final Exam May 9 2005...

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Chemistry 162 Final Exam May 9, 2005 Student Name: _____________________ Recitation Section Number: ____ Recitation Instructor: _________________________ 01 = M3, F. Serefiddin 03 = M5, R. Agarwal 04 = M5, F. Serefiddin 06 = W3, F. Serefiddin 07 = W3, H. Sangari 08 = W5, H. Sangari 11 = F3, R. Porcja 17 = M1, R. Agarwal 19 = M3, R. Agarwal 20 = M3, H. Sangari 23 = W1, E.Tavss 25 = W3, E. Tavss 26 = W3, L. Petrone 30 = TH3 L. Petrone 31 = TH3, E. Tavss 33 = M6, R. Porcja 34 = M6, H. Sangari 37 = M8, H. S angari 38 = W6, J. Jefferis 39 = W8, J. Jefferis The exam has 55 questions for credit and an additional one to check the color of your exam booklet. Please answer all 56 questions on the OpScan sheet. There is no penalty for guessing. At the end of the 180-minute exam period, please hand in your OpScan form. If you finish early, please do not disturb your fellow students. A proctor will check your picture-ID, OpScan form and signature and also collect your top sheet during the exam. Exam scores will be posted as soon as possible. ON THE OpScan FORM: (Use a Number 2 Pencil or Darker) (1) SIGN your name across the TOP of the form. (2) code only the following information: [ blacken circles] (a) Your Name . . . LAST NAME FIRST [ blank space between last and first names ] (b) Your SOCIAL SECURITY NUMBER [Start under Box A and continue to Box I ] (c) Your RECITATION SECTION NUMBER (Boxes K & L ) [Sections R1=51, R2=52, R3=53 (d) Your EXAM FORM NUMBER (Box P ) Your EXAM FORM is: c 162 FINAL EXAM V 1 SPRING 2005 1 See last page of exam for table of atomic weights, as well as a listing of all relevant formulas and constants.
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162 FINAL EXAM V 1 SPRING 2005 2 1. When tap water is heated in an uncovered pot, bubbles may be seen long before the water boils. This observation can be explained by: A. the temperature dependence of the mole fraction in Raoult’s Law B. the dependence of the boiling point on external pressure. C. changes in atmospheric pressure. D. the decomposition of a small amount of water E. the decreased solubility of gases at higher temperatures. 2. The decomposition of N 2 O 5 is a first-order reaction with a half-life of 22.0 minutes. Starting with an initial concentration of N 2 O 5 = 0.25 M, what is the initial rate of this reaction? 3. Consider the reaction: Br 2 (g) + 5F 2 (g) 2BrF 5 (g) + heat Assume this reaction is at equilibrium. Which one of the following changes will result in a decrease in the final Br 2 concentration? A. add Br 2 to reaction mixture B. add F 2 to the reaction mixture C. add BrF 5 to the reaction mixture D. raise the temperature E. add a catalyst
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