The purification of hydrogen gas is possible by diffusion through a thin palladium sheet. Calculate the number of kilograms of hydrogen that pass per hour through a 8.0-mm-thick sheet of palladium having an area of 0.65 m at 500C. Assume a diffusion coefficient of 4.6 x 10m/s that the concentrations at the high- and low-pressure sides of the plates are 3.2 and 0.77 kg/m of hydrogen per cubic meter of palladium, and that steady-state conditions have been attained. X M- keh