A mixture of H2(g) and N2(g) reacts in a closed container to form the ammonia (NH3(g)). The reaction ceases before either reactant has been completely consumed. At this stage 3.0 moles of N2, 3.0 moles of H2 and 3.0 moles of NH3 are present. Determine the number of moles of H2 and N2, were present originally?