Disulfur dichloride (S2Cl2) is used in the vulcanization of rubber, a process that prevent...

Disulfur dichloride (S2Cl2) is used in the vulcanization of rubber, a process that prevents the slippage of rubber molecules past one another when stretched. It is prepared by heating sulfur in an atmosphere of chlorine:

What is the theoretical yield of S2CI2 in grains when 4.06 g of S8 are heated with 6.24 g of Cl2? If the actual yield of S2Cl2 is 6.55 g, what is the percent yield?