Hydrochloric acid (HCI) diffuses through a thin film of water (2.0 mm thick) at 290 K The concentration of HCl at point l on one boundary of the film is 8% by mass and on the other end of the boundary, at point 2 is 5% by mass. Density of the solution mixture at points 1 and 2 are 1080 kg/m3 and 1060 kg/m3 respectively. The diffusivity of HCI in water is 2.6 x 10-8 m2/s. Calculate the molar flux of HCl assuming water to be stagnant. Assume that the net molar concentration remains almost constant across the film (or take an average of the concentrations on both sides of the film).