NO2+O2

The reaction you are referring to seems to involve nitrogen dioxide (NO2) and molecular oxygen (O2). If you're looking for a chemical reaction involving these compounds, it often relates to the formation of nitrogen oxides or the oxidation of nitrogen compounds.

A common reaction involving NO2 and O2 is the following:

\[ 2 \text{NO}_2 + \text{O}_2 \rightarrow 2 \text{NO}_3 \]

This equation shows NO2 reacting with O2 to form dinitrogen trioxide (NO3). However, it's essential to specify the conditions because nitrogen oxides (NOx), including NO2, can behave differently under various temperatures and pressures.

If you have a particular reaction in mind or would like to know about a specific context (e.g., environmental impact, industrial processes, or theoretical aspects), please provide more details!