with explain the solving please

Material balance equation NH3(aq) =? 196 kg/hr 99 Kg/hr N2 =? H2 =? 294 kg/h 15% only N2 - 100Kg/ht NH3 =? Jo Kahe H = 300kg/ht Iron catalyst N2 =? 15 kg/h H2 =? 45 Kg/bt Unreacted gases N2 =? 8 Ko/be H2 =? 255kg/h