Because air is a composition of all kinds of gases and is different everywhere.
The chemical formula for the oxygen in the air is O2, where the 2 should be a subscript.
Lithium oxide has the chemical formula Li2O.Soium oxide has the chemical formula Na2O.Lithium sodium oxide has the chemical formula LiNaO.
There is no such thing as "nitrade." Nitrate is NO3; nitride is N3.
There is no such thing as fluoride gas.Fluorine gas is F2
The chemical formula for beryllium nitrate is Be(NO3)2.
chemical symbols and formula are short hand for chemicals to save every thing being massive like rutherfordium is Rf.
Free nitrogen is diatomic. Write the formula as: N2.
Lithium peroxide's chemical formula is Li2O2. This compound is typically used in spacecrafts to remove CO2 from the air.
Elemental nitrogen in the air occurs in diatomic molecules and therefore has the formula N2.
Our atmosphere is made up of 78.09% nitrogen 20.95% oxygen, 0.93% argon, 0.039% carbon, and traces of other gases. All of these gases have chemical formula. Air is an incredibly vague term that amounts to 'whatever gases are present where you are'. If you are on Venus, the atmosphere is 96.5% carbon dioxide, but it is still 'air'. 'Air' is not an element. It has no set formula.
This gas is argon - 0,9340 %. The chemical symbol (not formula) is Ar.
Balloons contain helium or hot air.