Oxygen is being absorbed from a gas in a small experimental wetted wall tower, as shown in the above figure. The absorbing fluid is water, which is moving with an average velocity of 20.0 cm/sec. What is the absorption rate in gmoles/hr if D(O2-H2O) = 1.55e-5 cm^2/sec in the liquid phase and if at saturation the mol fraction of oxygen in water is 0.0045? The dimensions of the column are given in the figure. Ignore any chemical reactions between O2 and H2O.
