Hydrogen was collected over water at 21.0°C on a day when the atmospheric pressure was 748.0 Torr. The volume of the gas sample collected was 300. mL. The vapor pressure of water at 21.0°C is 18.65. Torr. 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? a. C.

Hydrogen was collected over water at 21.0°C on a day when the atmospheric pressure was 748.0 Torr. The volume of the gas sample collected was 300. mL. The vapor pressure of water at 21.0°C is 18.65. Torr. 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? a. C.

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter8: Gases

Section: Chapter Questions

Problem 89E

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