Quiz 6-solutions - Version 180 Quiz 6 laude (51635) 1 This...

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Unformatted text preview: Version 180 Quiz 6 laude (51635) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 5.0 points Consider the elementary reaction: CH 2 O( g ) + O 2 ( g )- CO 2 ( g ) + H 2 O( g ) If k = 2 . 25 10 3 M- 1 s- 1 , and there is ini- tially 4 M O 2 , how long will it take for the O 2 concentration to reach 0 . 4 M ? 1. 10 ms 2. 9 ms 3. 1 ms correct 4. 10 s 5. 90 s Explanation: 1 [O 2 ] = 1 [O 2 ] + kt 1 . 4 = 1 4 + ( 2 . 25 10 3 ) t t = 0 . 001 s 002 5.0 points Consider the rate constants below. Which would correspond to the highest order reac- tion? 1. k = 4 . 46 10- 1 M- 1 s- 1 2. k = 8 . 79 10 2 M s- 1 3. k = 2 . 35 10 6 s- 1 4. k = 1 . 88 10- 3 M- 2 s- 1 correct Explanation: Units of M- 2 s- 1 would correspond to a 3 rd order reaction. 003 5.0 points Consider the reaction mechanism below: Step Reaction 1 CH 3 Br- CH 3 + + Br- 2 CH 3 + + HCl- CH 3...
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Quiz 6-solutions - Version 180 Quiz 6 laude (51635) 1 This...

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