mention the name and uses of various gases that comprise the air
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Oxygen (O2): medical use, welding.
Nitrogen (N2): fire suppression, provides an inert atmosphere.
Helium (He): balloons, medical equipment.
Argon (Ar): welding, provides an inert atmosphere for materials.
Carbon dioxide (CO2): carbonated soft drinks.
Acetylene (C2H2): welding
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