A solution is prepared from 2.50 g of an unknown compound and 25.0 g of benzene, C6H6. The freezing point of this solution is 4.3 degree celsius. Calculate the molar mass of the compound if given that normal freezing point of C6H6 = 5.5 oC , the freezing point depression constant for C6H6 = -5.12 oC/m .