The reaction NO2(g)  +  CO2(g)  -->  NO(g)  +  CO2(g)  has a rate law of:  Rate = k[NO2]2.  Write the integrated rate law for this reaction. If the initial concentration of NO2 is 0.500 M and the rate constant is 2.08 x 10–4 M–1 s-1, what is the half-life? What is the concentration of NO2 after 2.70 x 104 seconds?

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