Chemical Kinetics Worksheet With Answers By Prof. Abdullah M. Asiri - 2009 Page 3
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33August 16, 2009
[PROBLEM SET FROM R. CHANG TEST
BANK]
10. The reaction A + 2B → products was found to have the rate law, rate = k[A] [B]
2
. Predict by what factor
the rate of reaction will increase when the concentration of A is doubled and the concentration of B is also
doubled.
A.
2
B.
4
C.
6
D.
8
E.
9
11. The reaction A + 2B → products was found to follow the rate law, rate = k[A]
2
[B]. Predict by what factor
the rate of reaction will increase when the concentration of A is doubled, the concentration of B is tripled,
and the temperature remains constant.
A.
5
B.
6
C.
12
D.
18
E.
none of these
12. Appropriate units for a first-order rate constant are
A.
M/s.
B.
1/M·s.
C.
1/s.
2
D.
1/M
·s.
13. It takes 42.0 min for the concentration of a reactant in a first-order reaction to drop from 0.45 M to 0.32 M
at 25°C. How long will it take for the reaction to be 90% complete?
A.
13.0 min
B.
86.0 min
C.
137 min
D.
222 min
E.
284 min
3
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