The following information is the elemental step of an experimentally proven mechanism
What is the order of this elemental step?
A. 0
B. 1
C. 2
D. 3
C
The rate law includes the concentration of the reactant raised to a power equal to its coefficient. The order of nitrogen dioxide is therefore 2. Note that the rate law can be derived directly from the stochiometric coefficients because the reaction and the overall reaction in this case are the same. Elemental means this step cannot be broken into any substeps.