Mgo + = Mgcl2

It looks like you're writing a chemical reaction involving magnesium oxide and magnesium chloride. The correct balanced equation should be:

\[ \text{MgO} + \text{Cl}_2 \rightarrow \text{MgCl}_2 + \text{O}_2 \]

However, this depends on the reaction conditions. Could you clarify what reaction you are referring to?

If you mean the reaction of magnesium oxide with hydrochloric acid, for example:

\[ \text{MgO} + 2 \text{HCl} \rightarrow \text{MgCl}_2 + \text{H}_2\text{O} \]

Please specify the reactants and conditions for a more accurate answer.