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
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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