Calculate the rate of diffusion (in & mole/m s) of acetic acid across a film of non-diffusing water solution i mum thick at 17 c when the concentrations on opposite sides of she glm are 9 and 3 wt % acid, respectively. the diffusivity of acetic acid in the solution is 47 10inchis) given that, the densities of the 9 wtand 3 w % solution are 1012 and 1003 2 kgmrespectively.