( Most commercially produced O2 is used to smelt iron into steel . )
( Low pressure pure oxygen is used in space suits )Oxygen
Oxygen is obtained from the air. It can be compressed and stored in cylinders, or it can be kept as a liquid at its boiling point of -182 ℃ in insulated tanks .
Oxygen is third most abundant element in the universe by mass after hydrogen and helium and the most abundant element by mass in the Earth's crust.
Structure
At standard temperature pressure , oxygen is colorless , odorless gas with the molecular formular O2, in which the two oxygen atoms are chemically bonded to each other with a spin triplet electron configuration .
Oxygen is very important in our life !
Useso of Oxygen : ( applications )
Medical
In hospitals , Oxygen in cylinders is used to help people with breathing difficulties. Ambulances carry oxygen for the same purpose.
Life support and recreational use
A notable application of Oxygen as a low-pressure breahing gas is in modern space suits, Which surround their occupant's body with pressurized air. These devices use nearly pure oxygen at about one third normal pressure , resulting in a normal blood partial pressure of oxygen .
Industrial
Smelting of iron ore into steel comsumes 55% of commercially produced Oxygen .
Oxygen is used in industry for combustion. For example , in making steel , oxygen gas is passed into molten iron to burn off impurities .
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