The reaction between nitric oxide and oxygen is described by the following chemical equation: 2NO+ 2O2 â 2NO2
2NO+ 2O2 â 2NO2 + O

Suppose a two-step mechanism is proposed for this reaction, beginning with this elementary reaction. Suppose also that the second step of the mechanism should be bimolecular. Suggest a reasonable second step. That is, write the balanced chemical equation of a bimolecular elementary reaction that would complete the proposed mechanism.

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Explanation:

A non elementary reaction is a reaction that does not take place in a single reactive encounter. Non elementary reactions take place in steps. These steps are referred to as the reaction mechanism.

The reaction between nitric oxide and oxygen is a non elementary reaction. It takes place in two steps as i will now show below;

Step 1

NO(g) + O2(g) > NO2(g) + O(g)

Step 2

NO(g) + O(g) > NO2(g)

Overall reaction equation

2NO(g) + O2(g) > 2NO2(g)

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