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Air is a mixture of gases, most of which are naturally occurring. Air also contains a significant amount of human-made air pollutants, including some that are not safe to breathe and some that warm our planet’s climate. The troposphere also contains water in all three phases (liquid, solid, and gas) as well as solid particles called aerosols.
Air, mixture of gases comprising the Earth’s atmosphere. The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are variable in both space and time. The atmospheric gases of steady concentration (and their proportions in percentage by volume)
- The Editors of Encyclopaedia Britannica
Jul 29, 2024 · The Chemical Composition of Our Air. Nitrogen gas is the primary component of air. Nitrogen, oxygen, water vapor, argon, and carbon dioxide account for about 99% of the composition of air. Trace gases in Earth's atmosphere include neon, methane, helium, krypton, hydrogen, xenon, ozone, and many other elements and compounds.
- Anne Marie Helmenstine, Ph.D.
Feb 1, 2021 · Chemical Composition of Air. About 99% of the composition of air consists of nitrogen, oxygen, and argon. Water vapor (variable) and carbon dioxide are the main trace gases. There is no chemical formula for air because the Earth’s atmosphere consists of a mixture of gases. Just three gases account for 99% of dry air: nitrogen, oxygen, and argon.
Components in Dry Air. Air is a mixture of several gases, where the two most dominant components in dry air are 21 vol% oxygen and 78 vol% nitrogen . Oxygen has a molar mass of 15.9994 g/mol and nitrogen has a molar mass of 14.0067 g/mol. Since both of these elements are diatomic in air - O2 and N2, the molar mass of oxygen gas is 32 g/mol and ...
Air is the mixture of gases that makes up the atmosphere. The amount of water vapour in the air varies from place to place, and day to day. For this reason, the proportions of the gases in the air ...
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The air in the atmosphere is a mixture of gases. Most of the atmosphere is nitrogen (80%) with around 20% oxygen and other trace gases.
