Question

how do you calculate the pressure of dry gas from​

Answer 1

To obtain the gas pressure, subtract the vapor pressure of water from the total pressure. EXAMPLE: A 325 mL sample of gas is collected over water at 26oC and 742 mm Hg pressure. Calculate the volume of the dry gas at STP. The vapor pressure of water is 25 mm Hg at 25oC.

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Answer 2

Answer:

To obtain the gas pressure, subtract the vapor pressure of water from the total pressure. EXAMPLE: A 325 mL sample of gas is collected over water at 26oC and 742 mm Hg pressure. Calculate the volume of the dry gas at STP. The vapor pressure of water is 25 mm Hg at 25oC.

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