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Calculate the rate of mass transfer per unit area (mol/(s cm2)) of an ion in solution when the stationary mass transfer boundary layer thickness is

Calculate the rate of mass transfer per unit area (mol/(s cm2)) of an ion in solution when the stationary mass transfer boundary layer thickness is 0.005 cm, the difference between the bulk and surface concentration is 0.15 mol/l, and the diffusivity of the ion is 3 105 cm2/s. (Answer: 9 107 mol/(s cm2)

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