What happens when

One mole ammonium dichromate when heated decompose to form one mole of chromic oxide, one mole of nitrogen and four moles of water. (NH4)2Cr2O7 → Cr2O3 + N2 + 4H2O

Dinitrogen is prepared in the laboratory by heating a solution an equivalent amount of sodium nitrite and ammonium chloride when ammonium nitrite and sodium chloride are formed. Ammonium nitrite then decomposes to nitrogen and water. NH4Cl + NaNO2 → NH4NO2 + NaCl NH4NO2 → N2 + 2H2O

One mole of calcium phosphide reacts with six moles of water to form two moles of phosphine and three moles of calcium hydroxide. Ca3P2 + 6H2O → 3Ca(OH)2 + 2PH3

One mole of magnesium nitride reacts with six moles of water to form two moles of ammonia and three moles of magnesium hydroxide. Mg3N2 + 6H2O → 3Mg(OH)2 + 2NH3

Four moles of phosphorous acid decompose to form three moles of phosphoric acid and one mole of phosphine. 4H3PO3 → 3H3PO4 + PH3

Three moles of nitrous acid decompose to form one mole of nitric acid, two moles of nitric oxide and one mole of water. 3HNO2 → HNO3 + 2NO + H2O