material balance

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Wet air containing 4.0 mole% water vapor is passed through a column of calcium chloride pellets. The pellets adsorb 97.0% of the water and none of the other constituents of the air. The column packing was initially dry and had a mass of 3.40kg. Following 5.0 hours of operation, the pellets are reweighed and found to have a mass of3.54kg.

(a)Calculate the molar flow rate (mol/h) of the feed gas and the mole fraction of water vapor in the product gas

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