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Uses of oxygen gas

Answer Text:
Uses of oxygen.
1. Used in hospitals for breathing by patients with breathing difficulties;
2. It is used by mountain climbers and deep sea divers for breathing;
3. It is used to burn fuels e.g. burning fuels for propelling rockets;
4. Used in welding and cutting metals
Examples:
- It combines with hydrogen to form a very hot oxyhydrogen flame that is used in welding and cutting metals;
- It combines with acetylene to form oxy-acetylene flame which is also used in welding and cutting metals;
5. During steel making, oxygen is used to remove iron impurities.
- During this process oxygen is blown over hot impure iron.
- The oxygen react with carbon impurities forming carbon (IV) oxide which escapes laving pure iron which is steel due to its higher purity;