QUESTION HOW IRON REACTS WITH STEAM AND FORM IRON OXIDE ANSWER: 3 Fe + 4 H 2 O ⟶ Fe 3 O 4 +4 H 2 ( g ) Generally metal react with steam to form metal oxide and hydrogen gas. Iron reacts to form iron ( II , III ) oxide [ Fe O + Fe 2 O 3 ] and H 2 gas. see this vodeo for better understanding