Dear all, I am currently doing a lab question. I do not know how to solve a calculation question. Question: Calculate the average flux of the oxygen through the gas-liquid interface in the wetted-wall column. Remember that a more accurate value of the average flux can be calculated by taking the the liquid film thickness into account. BAckground: In this experiment, we have to take note of dissolved oxygen concentration at the inlet and outlet of a wetted column for changing air and water flow rates. Air will flow in from the bottom while de-oxygenated water will flow down from the top. Oxygen will diffuse into the water. I would appreciate any help. Thanks.