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Oxygen Gas
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Which gas do we need to breathe?
Oxygen
The ratio of Oâ‚‚ gas in the atmosphere is fixed. Right or wrong?
Right
Oxygen gas is composed of 3 atoms ?
Wrong, only two atoms.
Which gas represents one fifth of the atmosphere.
Oxygen
Is Oxygen solid, liquid or gas ?
It is a gas.
is there Oxygen in the Air ? How much ?
Yes, 21%