the diagram below shows 2 flasks, a and b, each containing the same gas but at different pressures when the valve is closed. the tube connecting the flasks is of negligible volume. the pressure in flask a, of volume 1.0 l, is 0.80 atm, while the pressure in flask b, of volume 3.0 l, is 0.60 atm. what will be the pressure in the apparatus when the valve is opened, assuming the temperature remains constant and no gas escapes? give your answer to 2 significant figures.
