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

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Problem Details

Consider the following reaction:

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

When the initial concentration of NO2 is 100 mM, it takes 55 s for 90% of the NO 2 to react. Calculate the rate constant.

a) 0.042 mM–1·s–1

b) 1.8 x 10–5 mM–1·s–1 

c) 1.6 mM–1·s–1

d) 1.6 x 10–3 mM–1·s–1 

e) 0.13 mM–1·s–1 

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