Q1: [5 marks] a gas mixture containing (N2=10%, H-25%, NH3=60%, and Ar=5%) flows through a pipe, 25.4 mm in diameter, at 4.05 bar total pressure. If the velocities of the respective components are 0.04 m/s, 0.045 m/s, 0.04 m/s, and 0.025 m/s. Calculate the molar and mass average velocities of the mixture. Please note that the molecular weight for N2-28 kg/kmole, H2=2 kg/kmole, NH3 17 kg/kmole, Ar =40 kg/kmole.