In atmosphere about
about 21% of oxygen presents. And pure oxygen
is extracted from that air. The atmospheric air is
compressed through a series of ventures the different
gases in air begin to separate at different temperature.
When natural air is freezes and temperature goes reaches
to –297 degrees Fahrenheit oxygen is in liquid form.
Liquid oxygen has a density of 1140 kg/m³. For
industrial applications oxygen is obtained from air
by fractional
distillation process.
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