The partial pressure of carbon dioxide in a mixture is 0.31 atm. If the mole fraction of carbon dioxide is 0.46 , what is the total pressure of the mixture

A1.50-liter sample of dry air in a cylinder exerts a pressure of 3.00 atmospheres at a temperature of 25°c. without changing the temperature, a piston is moved in the cylinder until the pressure in the cylinder is reduced to 1.00 atmospheres. the volume of the gas is