Question
Asked Sep 9, 2019
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9. For the reaction of 2NO2(8) 2N2O4(g)
->
If the reaction is found to be first order reaction with a rate constant = 0.183 1/s. Suppose
that [NO2lo 0.255M
a) How long does it take for the [NO2] to decrease to 55% of its initial value?
b) What is the [NO2] after 12.5s?
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9. For the reaction of 2NO2(8) 2N2O4(g) -> If the reaction is found to be first order reaction with a rate constant = 0.183 1/s. Suppose that [NO2lo 0.255M a) How long does it take for the [NO2] to decrease to 55% of its initial value? b) What is the [NO2] after 12.5s?

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Expert Answer

Step 1

The rate constant for the first-order reaction can be written as follows

Here,

K is the rate constant and

t is the time in second

a is the initial concentration and is equal to 0.255 M

a-x is the concentration at any time t

Since it is given that NO2 concent...

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a In a-x k In а-х 0.255M 0.1831s- In 0.14M t 3.22s

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