NH4NO3 = N2O + 2 H2O Moles of NH4NO3 = 1/2 x moles of H2O = 1/2 x 0.625 = 0.3125 mol Solution NH4NO3 = N2O + 2 H2O Moles of NH4NO3 = 1/2 x moles of H2O = 1/2 x 0.625 = 0.3125 mol.Read less