Air

From Freepedia

For other uses, see Air (disambiguation).

Air is a name for the mixture of gases present in the Earth's atmosphere. Compressed air is often used in scuba diving as a shallow water breathing gas and to inflate buoyancy devices. Compressed air is also used as the means of transmission of energy to pneumatic tools.

Composition of air

By volume, air is about:

• 78.084% Nitrogen (N₂)
• 20.947% Oxygen (O₂)
• 0.934% Argon (Ar)
• 0.033% Carbon Dioxide (CO₂)

With trace amounts of:

• Neon (Ne)
• Helium (He)
• Krypton (Kr)
• Sulfur dioxide (SO₂)
• Methane (CH₄)
• Hydrogen (H₂)
• Nitrous Oxide (N₂O)
• Xenon (Xe)
• Ozone (O₃)
• Nitrogen dioxide (NO₂)
• Iodine (I₂)
• Carbon monoxide (CO)
• Ammonia (NH₃)

See also

• Air glow
• Density of air

External link

• Composition of Air