Mg +O2=

The reaction between magnesium (Mg) and oxygen (O₂) is a combustion reaction that produces magnesium oxide (MgO). The balanced chemical equation for this reaction is:

\[ 2 \text{Mg} + \text{O}_2 \rightarrow 2 \text{MgO} \]

This indicates that two moles of magnesium react with one mole of oxygen to produce two moles of magnesium oxide.