The pressure gauge on a tank registers the gauge pressure, which isthe difference between the interior and exterior pressure. When thetank is full of oxygen (O2), it contains 15.0 kg of the gas at a gauge pressure of 35.0 atm. Determine the mass of oxygen that has beenwithdrawn from the tank when the pressure reading is 22.0 atm. Assume the temperature of the tank remainsconstant.