Exam%203%20224%202008%20Crib

Exam%203%20224%202008%20Crib - CHEMISTRY 224 EXAM 3 April...

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CHEMISTRY 224 EXAM 3 April 3, 2008 1. There are twenty (20) multiple-choice questions. Code answers for the multiple-choice questions on the scan sheet. 2. Write your name and student ID number on the answer sheet. 3. Write your Graduate Instructor's name on the line for "Instructor" on the answer sheet. 4. Use a #2 HB pencil to code all information onto the answer sheet. 5. Code your name and student ID number on the answer sheet. 6. Code 0224 as the "Section Number" on the answer sheet. 7. Code the best answer to each question on the answer sheet. 8. Figure 1, which is referred to in several questions, is at the end of the exam. 9. Relevant equations are listed at the end of the exam (before Figure 1). 10. Each multiple-choice question is worth ten (10) points. The total score for this exam is two hundred (200) points. CONFIRM THAT YOUR EXAM INCLUDES ALL TWENTY (20) QUESTIONS
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1. Which of the following kinetic based approaches discussed in this class would be expected to be least prone to error due to variations in enzyme activity in an enzyme catalyzed reaction: a. the graphical method b. the two-rate method c. the optimized one-rate method d. the initial rate method ® pseudo-equilibrium method 2. The imaginary radioactive element Purdunium decays to Indianium by alpha particle emission with a half-life of 0.396 s. How long will it take for 99% of a Purdunium sample to decay to Indianium? (!).6.'1J -t.~:3. . :. Cl.6ct) k ::--- 4.02 x 10- 3 s 1<. C) .::rCJ" 5.74 X 10- 3 s 1.84 s C rv ,J."'. ..:. ........ 7 t - (1.1-1"") t: =.0.01 = e (9) 2.63 s (P",n:L. ., 0'\' v..,]o e. Insufficient information is provided. _ I V\ O.f) I 1:. = I. 1-r = b J' s 3. Refer to Figure 1 and indicate which curve shape best represents reactant concentration (dependent variable) versus time (independent variable) in a first order reaction: ® curve 1 curve 2 curve 3 d.
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Exam%203%20224%202008%20Crib - CHEMISTRY 224 EXAM 3 April...

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