A gas mixture at 15.0 °C and 105.0 kPa is fed to a mixing unit. The gas mixture contains 1.20 mol % CO2 and the balance N2. Pure CO2 gas is also fed to the mixing unit as a separate stream with a flow rate of 0.1200 m3 /min at 7.00 °C and 131.0 kPa. The output stream leaving the mixing unit has 4.45 mol % CO2. Calculate the volumetric flow rate of the gas mixture entering the mixing unit (ft3 /min). The process is at steady state. Assume ideal gas behaviour. (Hint: You need to make mole balance(s) to solve this problem.)
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