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Chemistry, 14.05.2021 01:00 weirdest16

A toy balloon containing 425 mL of He escapes from a little boy watching a parade. The temperature at street level is 32°C and the pressure is 745 mmHg. When the balloon stops rising, its volume has become 895 mL
and the atmospheric pressure has decreased to 300. mmHg. What is the temperature, in °C, at this altitude?
Round your answer to 2 significant figures.

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