A 250 mL sample of oxygen is collected over water at 25 degrees Celsius and 769 torr pressure. What is the pressure of the dry gas alone? (Vapor pressure of water at 25 degrees Celsius = 23.8 torr)

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asked Oct 11, 2023 72.5k views

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A 250 mL sample of oxygen is collected over water at 25 degrees Celsius and 769 torr pressure. What is the pressure of the dry gas alone? (Vapor pressure of water at 25 degrees Celsius = 23.8 torr)

Chemistry
college

Rence asked

by Rence

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Dalton's Law

P tot = P H₂O + P gas

769 = 23.8 + P gas

P gas = 745.2 torr

Jianping answered Oct 17, 2023

by Jianping

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