Chapter 14, Problem 34E

Consider the reaction:

${\text{NO}}_2\left(\text{g}\right)\to \text{NO}\left(\text{g}\right)+\frac{1}{2}{\text{O}}_2\left(\text{g}\right)$
The tabulated data were collected for the concentration of NO₂ as a function of time.

Time (s)	[NO2](M)
0	1.000
10	0.951
20	0.904
30	0.860
40	0.818
50	0.778
60	0.740
70	0.704
80	0.670
90	0.637
100	0.606

a. What is the average rate of the reaction between 10 and 20 s? Between 50 and 60 s?
b. What is the rate of formation of O₂ between 50 and 60 s?