For the reaction `NO_(2)(g) + CO(g) to NO(g) + CO_(2)(g)`, the experimentally determined rate expression at 40 K is:
rate =`k[NO_(2)]^(2)`
What is the proposed mechanism for the reaction?

Explanation

According to available information, rate is proportional to the square o f the molar con Dentation of `NO_(2)` . Therefore, the proposed mechanism for the reaction is :
`NO_(2) + NO_(2) overset("slow") to NO + NO_(3)`
`NO_(3) + CO overset("fast") to CO_(2) + NO_(2)`