The volume of the mixture is 1.7 L and its total pressure is 0.810 atm if zinc metal is added to hydrochloric acid to generate hydrogen gas and is collected over a liquid whose temperature is the same as pure water at 20.0 degrees C (18 torr).
1. Describe the partial pressure of hydrogen gas in this mixture.
2. Describe the number of moles of hydrogen gas present in the sample.