A Possible Reaction Mechanism for the Reaction of Nitrogen Dioxide

Multiple Choice

A possible reaction mechanism for the reaction of nitrogen dioxide with carbon monoxide is
$\begin{array}{l}2 \mathrm{NO}_{2}(g) \rightarrow \mathrm{NO}_{3}(g) +\mathrm{NO}(g) &(slow) \\\mathrm{NO}_{3}(g) +\mathrm{CO}(g) \rightarrow \mathrm{NO}_{2}(g) +\mathrm{CO}_{2}(g) &(fast) \end{array}$

What is the overall reaction and the most probable rate law for the reaction?

A) NO₂(g) + CO(g) ? NO(g) + CO₂(g) ;rate = k[NO₂]
B) NO₂(g) + CO(g) ? NO(g) + CO₂(g) ;rate = k[NO₂]²
C) NO₂(g) + CO(g) ? NO(g) + CO₂(g) ;rate = k[NO₃]×[CO]
D) 2NO₂(g) + CO(g) ? NO(g) + CO₂(g) ;rate = k[NO₂]×[ NO₃]×[CO]
E) 2NO₂(g) + CO(g) ? NO(g) + CO₂(g) ;rate = k[NO₃]×[CO]