A solution of 5.0g benzoic acid (C6H5COOH) in 100.0g of carbon tetrachloride has a boiling point of 77.5C. The boiling point of pure CCl4 is 76.5C. Calculate the molar mass of benzoic acid in the solution based on the boiling point elevation. (kb for CCl4 is 5.03 C/m)