10. A solution contains 1.50 g of solute in 30.0 g of benzene and its freezing point is 3.74°C. The freezing point of pure benzene is 5.48°C. Calculate the molar mass of the solute. [Hint: Freezing point depression constant (Kf) for benzene is 4.9°C.kg/ mol] (A)1.47g/mol, (B)14.7g/mol, (C)147g/mol, (D)1,470g/mol, (E)14.7kg/mol