9. A sample of oxygen gas is collected over water. The temperature is 23.8 C. The total pressure of the oxygen gas and water vapor is 797.6 mm Hg. The vapor pressure of water at this temperature is 22.1 mm Hg. What is the partial pressure of the oxygen gas collected in the experiment? 10. Real gases exhibit departures from ideal behavior because: Real gas molecules occupy space Real gas molecules can interact with themselves Low temperature increases interactions between molecules in real gases High pressure increases molecular interactions in real gases All these cause departures from ideal behavior 797.6 mm Hg 819.7 mm Hg 775.5 mm Hg 752.9 mm Hg 841.8 mm Hg