100 kg of acetone (A)-water (B) solution at 25 C is in contact at one surface with an organic solvent in which acetone is soluble and water is insoluble. The solution forms a stagnant film of 2 mm thick. The concentration of acetone at point 1 is 15 wt% and the solution density (P.) is 988.69 kg/m. At point 2, the concentration of acetone is 8 wt% and the solution density (22) is 994.32 kg/m3. The diffusivity of acetone in water 1.28 x 105 cm/s. The molecular weight of acetone is 58.08 g/mol and water is 18.02 g/mol. Calculate the flux Na in kg mol/s.m- at steady state. (15 marks)