Is air chemically combined

Answer 1

No, it is not. Formation of solution is a physical change and no chemical reaction is involved in it. A chemical change is a reaction which is irreversible. Consider 20cm cube cube of salt dissolved in 20 cm cube of water. a solution is then formed. Now place the solution in the sun and you'll see that the water will evaporate, leaving salt crystals behind. you can see it is not chemically combined as you can separate it. Note for no confusion that: a chemical reaction is the process during which a substances changes to another but a chemical change is description of the process leading to a new substance.

Answer 2

Most commonly, oxygen, but others also

Oxygen: iron oxides (e.g. Haemeitite, Maghemite)

Hydrogen and oxygen: Iron oxyhydroxides (e.g. Goethite, akageneite)

Sulphur: Iron sulphide (e.g iron pyrites)

Answer 3

Iron is not a combination of any other chemicals because it is an element. If heated to sufficient temperatures, it can be combined to form things like steel.

Answer 4

Air is mixture of gasses- mainly oxygen and nitrogen- and the gasses are not chemically bonded to other gasses. However, some gasses, such as oxygen, bond to themselves- creating O2.

Answer 5

If you mean "are the elements in salt chemically combined" then yes.

Answer 6

No, they are combined through electrons, and can be split (from molecules to atoms, not splitting atoms themselves; there is no nuclear explosion).

Answer 7

No, air is a mixture of gases like nitrogen, oxygen, carbon dioxide, and others. These gases are not chemically combined but exist in the atmosphere as separate entities.

Answer 8

It is a chemical element.

Answer 9

Air is physically combined.