Write the equations for the reactions between hydrogen and a) oxygen, b) chlorine, c) sulfur, d) iron oxide (II, III) Fe3O4

Let us write down the reaction equation for the given compounds.

Reaction with oxygen.
2H2 + O2 -> 2H2O.
When hydrogen interacts with oxygen, water is formed.

Reaction with chlorine.
H2 + Cl2 -> 2HCl.
When hydrogen and chlorine interact, hydrochloric acid is formed.

Reaction with sulfur.
H2 + S -> H2S.
When hydrogen interacts with sulfur, hydrogen sulfide is formed.

Reaction with iron oxides.
H2 + FeO -> H2O + Fe.
The result is water and iron.

3H2 + Fe2O3 -> 2Fe + 3H2O.
The result is iron and water.

4H2 + Fe3O4 -> 3Fe + 4H2O.
Iron and water are formed.