Question: Need help with these 2 problems 1) A helium-filled weather balloon has a volume of 736 L at 19.9C and 755 mmHg. It is released

Need help with these 2 problems

1) A helium-filled weather balloon has a volume of 736 L at 19.9C and 755 mmHg. It is released and rises to an altitude of 5.43 km, where the pressure is 459 mmg and the temperature is - 14.1C

The volume of the balloon at this altitude is _______L.

2) A sample of oxygen gas occupies a volume of 6.40 L at 55.0C and 0.800 atm.

If it is desired to decrease the volume of the gas sample to 3.56 L, while increasing its pressure to 0.964 atm, the temperature of the gas sample at the new volume and pressure must be _______C.

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