Vapor Pressure
 1 When nitrogen is prepared and collected over water at 30oC and a total pressure of 98.4 kPa, what is its partial pressure in atm? 2 If you were to prepare oxygen and collect it over water at 10oC and a total pressure of 100.1 kPa, what is its partial pressure in atm, kPa and torr? 3 A sample of carbon monoxide was prepared and collected over water at a temperature of 20oC and a total pressure of 99.8 kPa. It occupied a volume of 275 mL. Calculate the partial pressure of this gas in the sample in kPa and its dry volume in mL under a pressure of 101.3 kPa. 4 A sample of hydrogen was prepared and collected over water at a temperature of 25oC and a total pressure of 98.1 kPa.  It occupied a volume of 295 mL. Calculate its partial pressure, in atm, and what its dry volume would be in mL under a pressure of 101.3 kPa. 5 What volume of "wet" methane would you have to collect at 20oC and 98.6 kPa to be sure the sample contained 240 mL of dry methane at the same pressure? 6 What volume of "wet" oxygen would you have to collect if you needed the equivalent of 260 mL of dry oxygen at 101.3 kPa and the atmosphereic pressure in the lab that day was 99.4 kPa?  The oxygen is to be collected over water at a temperature of 15.0oC. 7 Exactly 100 mL of oxygen are collected over water at 25oC and 106.66 kPa.  What is the pressure being exerted by the pure oxygen at 25oC. 8 In an experiment, a student collects 107 mL of hydrogen over water at a pressure of 104.8 kPa and a temperature of 31oC. What volume would this hydrogen occupy at SATP? 9 If  80.0 mL of oxygen are collected over water at 20oC and 95.0 kPa. What volume would the dry oxygen occupy at STP? 10 If 450 mL of hydrogen at STP occupy 511 mL when collected over water at 18oC, what is the atmospheric pressure? 11 In an experiment a student collects 58 mL of oxygen gas by the downward displacement of water at 18oC and 105 kPa pressure. What would the mass of the dry oxygen be?