Problem: A sample of hydrogen gas is mixed with water vapor. The mixture has a total pressure of 755 torr , and the water vapor has a partial pressure of 26 torr . What amount (in moles) of hydrogen gas is contained in 1.67 L of this mixture at 298 K?

FREE Expert Solution

Step 1. Find the pressure of H2

PH2 = Ptotal - PH2O 

PH2 = 755 - 26 

PH2 = 729 torr


Step 2. Use ideal gas equation to find moles

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Problem Details

A sample of hydrogen gas is mixed with water vapor. The mixture has a total pressure of 755 torr , and the water vapor has a partial pressure of 26 torr . What amount (in moles) of hydrogen gas is contained in 1.67 L of this mixture at 298 K?

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