Dichlorine monoxide is produce by passing chlorine gas over heated mercury (II) oxide according to the following unbalanced reaction: ______HgOïƒ ______Cl2 _______HgCl2 ________Cl2O Balance the reaction. Suppose the quantity of the reactants is sufficient to produce 0.86g of Cl2O, but only 0.71g is obtained. What is the percent yield?