You have a combination of gases exiting a flue stack. the composition of the gas is 5 wt% co, 65 wt% co2, 20 wt% h2o, and 10 wt% so2. what is the average molecular weight of the gas? if the percentages were the same, but mol% instead, what is the average molecular weight of the gas? (2) the marianas trench is the deepest place on the planet, with a depth of 6.831 miles. what is the pressure at the bottom of the trench, if you assume that the density of water is 1000 kg/m and does not change, gravity is 9.81 m/s', and the pressure at the surface is 1 atm?