A membrane is to be manufactured to the following specifications. The leak rate of hydrogen is not to exceed 10-3 mol-cm-2h-1 at 700 C when the concentration of hydrogen is maintained at 1.5 x 1019 atoms/cm3 on one side of the membrane and effectively zero on the other side. What is the minimum thickness of iron foil that will meet these requirements (express your results in cm)? The diffusion coefficient of atomic hydrogen in iron at 700 C is 3.091 x 10-4 cm2s-1. Assume steady state.
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