Calculate the rate of diffusion of water vapor from a thin layer of water at the bottom of a well 6 m in height to dry air flowing over the top of the well. Assume the entire system is at 298 K and 1 atm pressure. If the well diameter is 3 m, find out the total weight of water diffused per second from the surface of the water in the well. The diffusion coefficienct of water vapor in dry air at 298 K and 1 atm pressure is 0.256x10-4 m2/s. The partial pressure of water vapor at 298 K is 0.031 atm.