Answer:hydrogen gas is allowed to permeate through a thin plastic membrane that is 109 microns thick. concentrations of 0.025 moles/m3 and 0.0025 moles/m3 are maintained on the high and low pressure sides of the membrane, respectively. if the diffusivity of hydrogen gas molecules in the plastic is 4.1x10-8 m2/s, how many moles of hydrogen gas pass through a 4.0 square meter area of the plastic membrane every hour?
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