At high temperatures—for example, in a combustion process—nitrogen and oxygen in air can react to form nitrous oxide, 

Starting with air (79 mol % nitrogen and 21 mol % oxygen), compute the equilibrium concentrations of all the oxides of nitrogen at atmospheric pressure over the temperature range from 1000 to 2000 K. [The oxides of nitrogen are referred to collectively as NO_x compounds, and are smog-forming air pollutants.]

nitric oxide, N + O2 = NO N2 + O2 2NO and/or nitrogen dioxide, N +02= NO