information of air class 4
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Air is a gas that provides us with oxygen, but oxygen isn't the only element in air. In fact, only about 21% of air is oxygen, while about 78% is nitrogen and less than 1% is a mixture of other gases. Without air, living things would be unable to survive, including plants, animals, and human beings
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Air is made up of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and other gases in meager amounts. Water vapor is also a constituent of air in varying amounts along with dust particles. The molar mass of dry air or air with no/low quantity of water vapor in it is 28.97g/mol.
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