Nitrogen and oxygen gases react to form dinitrogen trioxide gas.
2 N2(g) + 3 O2(g) 2 N2O3(g)
At a certain temperature and pressure 1.4 L of N2 reacts with 2.1 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced?