Question

What happens when magnesium reacts with steam?

Answer 1

Magnesium burns in steam to produce white magnesium oxide and hydrogen gas.

Mg(s) + 2H2O(g) → Mg(OH)2(aq) + H2(g)

Answer 2

Hey is your answer...
Steam is also called water vapour. Water vapour contains water. So the reaction will be between magnesium and water.

MAGNESIUM+WATER-> MAGNESIUM HYDROXIDE.

Hope It Helps....
Thanks....