# What is the correct equation for showing the decomposition of "NO"_2"?

The correct equation showing the decomposition of ${\text{NO}}_{2}$ is:
"2NO"_2("g")$\rightarrow$"2NO(g) + O"_2("aq")
We can know it's a decomposition reaction because a single reactant forms two simpler products. In this case, the $\text{NO"_2}$ loses oxygen. For every two moles of ${\text{NO}}_{2}$ decomposed, two moles of oxygen atoms are lost, which form one mole of oxygen gas $\left(\text{O"_2}\right)$.