What is is air made of?

Answer 1

Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases.

Note however that air also contains a variable amount of water vapor, on average around 1%.

Answer 2

Air is a compound gas, which when dry has the following constituents:

Nitrogen, N2, 78.084%

Oxygen, O2, 20.947%

Argon, Ar, 0.934%

Carbon Dioxide, CO2, 0.0350%

Neon, Ne, 0.001818%

Helium, He, 0.000524%

Methane, CH4, 0.00017%

Krypton, Kr, 0.000114%

Hydrogen, H2, 0.000053%

Nitrous Oxide, N2O, 0.000031%

Xenon, Xe, 0.0000087%

Ozone, O3, trace

Carbon Monoxide, CO, trace

Sulphur Dioxide, SO2, trace

Nitrogen Dioxide, NO2, trace

Ammonia, NH3, trace

Answer 3

Air is made of atoms, hydrogen and oxygen.

Answer 4

Air is primarily composed of nitrogen (about 78%) and oxygen (about 21%), with small amounts of other gases such as argon, carbon dioxide, and water vapor.