A gas-filled weather balloon with a volume of 41.9 L is released at sea-level where the prevailing conditions are 757.5torr and 23.5°C. The balloon can expand to a maximum volume of 900 L. If the balloon rise to an altitude at which the temperature is -9.7°C as well as the pressure is 0.070atm, explain what will the volume of the balloon be?
At a height of 310 km above the Earth's surface an astronaut determines that the atmospheric pressure is about 1.27E-8 mmHg and the temperature is 597 K. Explain how many molecules of gas are there per milliliter at this altitude? Enter the number of molecules, with no units.