Consider three 0.03-m³ tanks filled, respectively, with N₂, Ar, and He. Each tank is filled to a pressure of 400 kPa at room temperature, 298 K. Determine the mass of gas contained in each tank. Also determine the number of moles of gas (kmol) in each tank.

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= PN₂ = 3 N₂ TAr = PAr = Ar THE = 298 K Phe = 400 kPa He