A flue gas is which the mole fraction of H2S is 0.002 enters a scrubber operating at steady state at 200 deg F, 1 atm and a volumetric flow rate of 20,000 ft^3/h. if the scrubber removes 92% (molar basis) of the entering H2S, determine the rate at which H2S is removed in LB/h. Comment on why H2S should be removed from the gas stream.