A sample of O2 gas is collected over water at 23∘ C at a barometric pressure of 751 mm Hg (vapour pressure of water at 23∘ C is 21 mm Hg). The partial pressure of O2 gas in the sample collected is ......
0.96 atm
Pressure of O2(dry) = 751 - 21 = 730 mm Hg = 730760 = 0.96 atm