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q15-A balloon is partly inflated with 5.05 liters of helium at sea level where the atmospheric...

q15-A balloon is partly inflated with 5.05 liters of helium at sea level where the atmospheric pressure is 1.00×103 mbar. The balloon ascends to an altitude of 3.00 × 103 meters, where the pressure is 855 mbar. What is the volume of the helium in the balloon at the higher altitude? Assume that the temperature of the gas in the balloon does not change in the ascent.

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