134.A 75 mL sample of CO2is collected over water at 25C when the atmospheric pressure is 1.05 atm. How many moles of CO2are present? The vapor pressure of water at 25C is 24.3 torr.
a.3.12b.0.0372c.0.00312d.2.37e.0.0322Whitten 10eTest Bank

ANS: COBJ:Apply the ideal gas law and Dalton's Law of partial pressures to determine the moles of a gas collected over water.TOP:Dalton's Law of Partial Pressures135.A 300.-mL sample of hydrogen, H2, was collected over water at 21C on a day when the barometric pressure was 748 torr. What mass of hydrogen is present? The vapor pressure of water is 19 torr at 21C.a.0.0186 gb.0.0241 gc.0.0213 gd.0.0269 ge.0.0281 gANS: BOBJ:Apply the ideal gas law and Dalton's Law of partial pressures to determine the mass of a gas collected over water.TOP:Dalton's Law of Partial Pressures
136.A 500.-mL sample of oxygen, O2, was collected by displacement of water at 24C under a barometric pressure of 738 torr. What mass of dry oxygen was collected? The vapor pressure of water at 24C is 22 torr.
137.A 5.42-liter sample of gas was collected over water when the temperature was 24C and the barometricpressure was 706 torr. The dry sample of gas had a mass of 5.60 g. What is the mass of threemoles of the dry gas? The vapor pressure of water at 24C is 22 torr.
138.A sample of hydrogen collected by displacement of water occupied 30.0 mL at 24.0C on a day when the barometric pressure was 736 torr. What volume would the hydrogen occupy if it were dry and at STP? The vapor pressure of water at 24.0C is 22.4 torr.
Whitten 10e
Test Bank

Whitten 10eTest Bank

139.A 300.-mL sample of hydrogen, H2, was collected over water at 21C on a day when the barometric pressure was 748 torr. What volume will the dryhydrogen occupy at STP? The vapor pressure of water is 19 torr at 21C.a.267 mLb.261 mLc.256 mLd.276 mLe.282 mLANS: AOBJ:Apply the ideal gas law and Dalton's Law of partial pressures to determine the volume of a gas collected over water.TOP:Dalton's Law of Partial Pressures