A metal, M , of atomic mass 56 amu reacts with chlorine to form a salt that can be represented as MClx. A boiling point elevation experiment is performed to determine the subscript , and therefore, the formula of the salt. A 31.9 g sample of the salt is dissolved in 100.0 g of water and the boiling point of the solution is found to be 377.02 K. Find the formula of the salt. Assume complete dissociation of the salt in solution.