A hydrogen ballon at the Earth's surface has a volume of 5.0 m3 on a day when the temperature is 200C and the pressure is 1.00 x 105 Pa. The ballon rises and expands as the pressure drops. What would the volume of the same number of moles of hydrogen be at an altitude of 40 km where the pressure is 0.33 x 103 Pa and the temperature is -130C?