The gases that comprise air can also contain variable amounts of water
vapor characterized by the term, "relative humidity." Because the amount of water
vapor held in air can change, it is simpler and more sensible to express component
gas percentages on the basis of dry air.
vapor characterized by the term, "relative humidity." Because the amount of water
vapor held in air can change, it is simpler and more sensible to express component
gas percentages on the basis of dry air.