Hydrogen was collected over water at 21.4°C on a day when the atmospheric pressure was 741. Torr. The volume of the gas sample collected was 254. mL. The vapor pressure of water at 21.4°C is 19.11 Torr. a. How many moles of H2 were present? b. How many moles of water vapor were present in the moist gas mixture? What is the mole fraction of hydrogen in the moist gas mixture? d. What would be the mass of the gas sample if it were dry?

Hydrogen was collected over water at 21.4°C on a day when the atmospheric pressure was 741. Torr. The volume of the gas sample collected was 254. mL. The vapor pressure of water at 21.4°C is 19.11 Torr. a. How many moles of H2 were present? b. How many moles of water vapor were present in the moist gas mixture? What is the mole fraction of hydrogen in the moist gas mixture? d. What would be the mass of the gas sample if it were dry?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter8: Properties Of Gases

Section: Chapter Questions

Problem 66QRT

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