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A helium-filled weather balloon has a volume of 842 L at 18.9°C and 758 mmHg. It is released and rises to an altitude of 6.99 km, where the pressure is 375 mmHg and the temperature is –24.1°C. The volume of the balloon at this altitude is___ L.

A mixture of argon and xenon gases, in a 8.85 L flask at 44 °C, contains 17.9 grams of argon and 22.6 grams of xenon. The partial pressure of xenon in the flask is____ atm and the total pressure in the flask is ____ atm.