# How long does it take for nitric oxide to turn into dinitrogen and dioxygen?

I'm new to chemistry and am studying nitric oxide as a combustion accelerant. Nitric oxide is said to be a free radical.

People say that nitric oxide, by itself, is pretty stable. But I saw that $$\ce{2NO -> N2 + O2}$$ so in a room of nitric oxide, will it decompose to nitrogen and oxygen?