Since oxygen is an element, it can not be made from chemicals. Instead, it can be separated from compounds. For example, water is made from molecules containing hydrogen and oxygen. When the bond between these two elements is broken by electrolysis, both the oxygen and the hydrogen can be collected.
Iron and oxygen
Carbon, oxygen and nitrogen.
you can't oxygen is an element, it cant be made by mixing anything other then oxygen
sugar energy carbon dioxide water
hydrogen is used to make different chemicals. if you combine it with oxygen it makes water.
If you could, then you mix hydrogen and oxygen. Water is H2O, which is hydrogen 2 parts oxygen. Have fun!
its got something to do with a base and an acid
Well at least one of them must be Oxygen, the other can be anything else.
The most important are: carbon, oxygen, hydrogen, phosphorus, sulfur etc.
I wouldn't say that many chemicals occur naturally in the air, however Oxygen and Nitrogen are the two main gases that make up the Earth's atmosphere.
Oxygen (O2)
carbon, oxygen