Assuming isothermal conditions at 25 degrees Celsius, a gaseous mixture containing 25% each by weight of methane, ethane, propane, and butane is stored in a 2 km tall tank. What will be the pressure exerted by the gases at the top of the tank when the pressure from the gases at the bottom part is 4 atm? Assuming isothermal conditions at 25 degrees Celsius, a gaseous mixture containing 25% each by weight of methane, ethane, propane, and butane is stored in a 2 km tall tank. What will be the pressure exerted by the gases at the top of the tank when the pressure from the gases at the bottom part is 4 atm