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Uses of oxygen

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Nitrogen

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 It is used to make fire extinguishers 
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Used in breathing 
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Used in combustion 
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Oxygen mixed with other  gas are used in welding 
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Used in breathing

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Used as rocket fuel
Used in hospitals by patients with breathing difficulties
Used in the extraction of iron from its ore

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Used in hospital for breathing 
Used in support burning
Used  as  breathing gas
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It is used in welding with acetylene gas

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It is used by patient who have difficulty in breathing

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