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a total of 0.400 L of hydrogen gas is collected over water at 18 C. The total pr

ID: 1001931 • Letter: A

Question

a total of 0.400 L of hydrogen gas is collected over water at 18 C. The total pressure is 742 torr, if the vapor pressure of water at 18 C is 15.5 torr, what is the partial pressure of hydrogen ? a total of 0.400 L of hydrogen gas is collected over water at 18 C. The total pressure is 742 torr, if the vapor pressure of water at 18 C is 15.5 torr, what is the partial pressure of hydrogen ? a total of 0.400 L of hydrogen gas is collected over water at 18 C. The total pressure is 742 torr, if the vapor pressure of water at 18 C is 15.5 torr, what is the partial pressure of hydrogen ?

Explanation / Answer

Ptotal = pH2 + pH2O

742 torr = pH2 + 15.5 torr

pH2 = 742 torr - 15.5 torr = 726.5 torr.

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