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Unformatted text preview: CHE 1113 Sample Exam 2 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) What is the overall order of the following reaction, given the rate law? 2 X + 3 Y 2 Z Rate = k[X] 1 [Y] 2 A) 2nd order B) 0th order C) 5th order D) 1st order E) 3rd order 2) 2) What are the units of k in the following rate law? Rate = k[X][Y] A) Ms B) M s C) M- 1 s- 1 D) M 2 s E) s M 2 3) 3) Which of the following represents the integrated rate law for a second- order reaction? A) 1 [A] t- 1 [A] o = kt B) ln [A] t [A] o = - kt C) ln k 2 k 1 = E a R 1 T + lnA D) k = Ae (- Ea/RT) E) [A] t- [A] o = - kt 4) The first- order decomposition of N 2 O at 1000 K has a rate constant of 0.76 s- 1 . If the initial concentration of N 2 O is 10.9 M, what is the concentration of N 2 O after 9.6 s? 4) A) 7.4 10- 3 M B) 1.4 10- 3 M C) 1.0 10- 3 M D) 8.7 10- 3 M E) 3.6 10- 3 M 5) 5) A reaction is found to have an activation energy of 38.0 kJ/mol. If the rate constant for this...
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- Spring '08