A helium balloon at a high altitude has 2.1 times 104 l of, Ask an Expert

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A helium balloon at a high altitude has 2.1 × 104 L of helium at 0.40 atm and -13°C. If the balloon descends to an altitude in which the atmospheric pressure is 1.00 atm and the temperature is 20°C, what will the volume of the balloon be at the lower altitude?

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