The water forecasting department uses ______ as the unit of pressure
On a humid summer day, the partial pressure of water in the atmosphere is 18 mm Hg. The barometric pressure on this day is as high as 766 mm Hg, Calculate the partial pressures of nitrogen and oxygen if 78.0% of the dry atmosphere is composed of nitrogen molecules and 21.0% of oxygen? (1% of the dry atmosphere is composed of all other gases)
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____.