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A balloon filled with hydrogen gas had a volume of 25000 L at a pressure of...

A balloon filled with hydrogen gas had a volume of 25000 L at a pressure of 760 mmHg and a temperature of 0 ∘C. When the balloon reached an altitude of 1000 m, the pressure was 628 mmHg and the temperature was − 9 ∘C. What was the volume in liters of the balloon at these conditions, if the amount of gas does not change?

A gas sample has a temperature of 23 ∘C with an unknown volume. The same gas has a volume of 462mL when the temperature is 88 ∘C, with no change in the pressure and amount of gas. What was the initial volume, in milliliters, of the gas?

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