# Problem: Consider the following reaction: 2NO2(g) →  2NO(g) + O2(g) rate = k[NO2]2 When the initial concentration of NO2 is 100 mM, it takes 55 s for 90% of the NO2 to react. Calculate the rate constant.  a) 0.042 M -1s -1  b) 1.8 x 10 -5 M -1s -1  c) 1.6 M -1s -1  d) 1.6 x 10 -3 M -1s -1.  e) 0.13 M -1s -1

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Consider the following reaction:

2NO2(g) →  2NO(g) + O2(g) rate = k[NO2]2

When the initial concentration of NO2 is 100 mM, it takes 55 s for 90% of the NO2 to react. Calculate the rate constant.

a) 0.042 M -1-1

b) 1.8 x 10 -5-1-1

c) 1.6 M -1-1

d) 1.6 x 10 -3 M -1s -1

e) 0.13 M -1s -1

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Based on our data, we think this problem is relevant for Professor Der Sluys' class at PSU.