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.