The mole fraction of XBac2 is 0.016, freezing point depression constant for water is 1.86 C kgmol"), and for 1 kg of water, the number of moles is 55.55 moles. (a) State the assumption for the depression of freezing point (ATF) of a dilute solution. (b) Calculate the number of moles for BaCl2. (C) Calculate the theoretical freezing point depression of an aqueous BaCl2 solution. (d) If the experimental freezing point depression is 0.35 C, calculate the value of the Van't Hoff factor