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# Problem 2: Methane containing 4 mol% N 2 is flowing through a pipleline at 105.1 kpa and 22 C.

__Problem 2:__ Methane containing 4 mol% N2 is flowing through a pipleline at 105.1 kpa and 22 °C. To check this flow rate, N2 at the same temperature and pressure are introduced to the pipleline at the rate of 2.83 m3/min. At the end of the pipe (where the mixing has completed), N2 concentration is found to be 4.82 mol%. What is the volumetric flow rate of the original feed (before the addition of N2) in m3/min?