Hi please help:)
Contains the average molecular weight of two chemist N2 and other gas mixtures It is calculated. The first chemist used the correct molecular weight of N2 (28) in the calculation; other on the other hand, it has taken into account 14 which indicates the molecular weight of N2. I. chemist and II. chemist Ace 36.8 and 31.2
It was found. Calculate the molar percentage of N2 in the mixture

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2