What is oxygen used for?

Answer 1

It is used with hydrogen to form water and when mixed with nitrogen it forms all but about 1% of air.

We need oxygen to breathe . Without oxygen we would no be able to survive on earth. It is also used to create fires that warm us and provide power for our machinery and as a fuel in welding flames and rocket fuels.

Answer 2

The most important use of oxygen is in respiration. Oxygen is of great importance in the chemical and the iron and steel industries. Its other major use is in steel production, for example in the Bessemer process. The oxyacetylene torch is another important industrial application. Oxygen is utilized in medicine in the treatment of respiratory diseases and is mixed with other gases for respiration in submarines, high-flying aircraft, and spacecraft. Liquid oxygen is used as an oxidizer in the fuel systems of large rockets.

Oxygen was formerly the official standard for the atomic weights of elements. The chemists used natural oxygen, a mixture of three isotopes, to which the value of 16 was assigned while the physicists assigned the value of 16 specifically to the oxygen isotope 16. In 1961 carbon-12 replaced oxygen as the standard.

Answer 3

Primarily animal (and plant ) life which would cease without it. Also it is used in the production of steel and other chemicals.