The oxidation of nitrogen monoxide by oxygen at $25C$

$2NO+O_{2}2N{O}_2$

is second order in NO and third order overall.

Complete the rate law for this reaction in the box below.

Use the form

$k[A{]}^m[B{]}^n,$ where $\text{'}1\text{'}$ is understood for

$m$ or

$n$ and concentrations taken to the zero power do not appear. Don't enter $1$ for

$m$ or

$n.$

Rate $=$