A proposed two-step mechanism for the reaction of carbon monoxide and nitrogen dioxide consists of the following steps:2 NO2 (g)→ NO3(g) + NO(g)NO3(g) + CO(g)→ CO2 (g) + NO2(g) (i)What is the overall reaction? (ii)If the rate law of the overall reaction is determined experimentally as rate = k [NO2]2, which step is the rate-determining one? Briefly justify your answer.

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