Reaction Rate
Chapter 15-1

Dr. Robert Belford & Xiaomin Tu



Question 1
In the reaction 2NO2---> 2NO + O2 at 3000C, the concentration of NO2 decreased from 0.0150 M to 0.0115M in 100s. What is the rate of disappearance of NO2 in M/s?
(A)  2.5e-5
(B)  3.5e-4
(C)  3.5e-5
(D)  2.5e-5
 
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Question 2
In the same reaction above, what is the rate of appearance of O2?
(A)  1.5e-5
(B)  1.75e-5
(C)  2.0e-5
(D)  none of the above
 
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Question 3
For the reaction in Q1, the disappearance of NO2 (g) was monitored as the following, what is the average rate of disappearance of NO2 between 10.0 and 30.0 seconds?
(A)  0.00185
(B)  0.00285
(C)  0.00385
(D)  none of the above
 
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Question 4
Use the data in Q3 to determine the relative rate of the reaction between 10.0 and 30.0 seconds.
(A)  7.25e-4
(B)  8.25e-4
(C)  9.25e-4
(D)  none of the above
 
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Question 5
Which of the following has the fastest appearance or disappearance rate?
C3H8 (g) + 5O2 (g) ---> 3CO2 (g) +4H2O(l)
(A)  C3H8
(B)  O2
(C)  CO2
(D)  H2O
 
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