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The reaction NO2 + CO → NO + CO2 takes place in two steps. Find the rate law. 2NO2 → NO + NO3 (k1) – slow NO3 + CO → CO2 + NO2 (k2) – fast 3 b) R = k2 c) R = k1 d) R = k1 2

The reaction NO2 + CO → NO + CO2 takes place in two steps. Find the rate law. 2NO2 → NO + NO3 (k1) – slow NO3 + CO → CO2 + NO2 (k2) – fast 3 b) R = k2 c) R = k1 d) R = k1 2 Correct Answer NO2

In any reaction the slowest step is the rate determining step, the rate of the overall reaction depends on this step. So, 2NO2 → NO + NO3(k1) is the rate determining step. Therefore the rate law R= k12.

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