Carbon monoxide and nitrogen dioxide react to form carbon dioxide and nitrogen monoxide according to the following equation.

$${\text{CO(g)}} + {\text{N}}{{\text{O}}_2}{\text{(g)}} \to {\text{C}}{{\text{O}}_2}{\text{(g)}} + {\text{NO(g)}}$$

The reaction occurs in a series of steps. The equation for the rate-determining step is given below.

${\text{2N}}{{\text{O}}_2}{\text{(g)}} \to {\text{N}}{{\text{O}}_3}{\text{(g)}} + {\text{NO(g)}}$

What is the rate expression for this reaction?

A.     rate $= k{\text{[CO(g)][N}}{{\text{O}}_2}{\text{(g)]}}$

B.     rate $= k{{\text{[N}}{{\text{O}}_2}{\text{(g)]}}^2}$

C.     rate $= k{\text{[N}}{{\text{O}}_3}{\text{(g)][NO(g)]}}$

D.     rate $= k{\text{[C}}{{\text{O}}_2}{\text{(g)][NO(g)]}}$

B