REACTION OF METAL WITH OXYGEN

Iron (Fe) + Oxygen (O2 ) + Water (H2O) → ?
Magnesium (Mg) + Oxygen (O2 ) → ?

Iron (Fe) + Oxygen (O2 ) + Water (H2O) → Fe2O3. xH2O( Rust)
Magnesium (Mg) + Oxygen (O2 ) →Magnesium oxide ( MgO) + Hydrogen gas (H2)