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Atmosphere
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The most abundant gas.in atmosphere
nitrogen
Importance of atmosphere
correct
It is a mixture of different gases that surround the earth. (Attracted by gravity)
atmosphere
we can prepare oxygen on lab
True
Is a chemical substance that remains without any change in its quantity and structure during the chemical reaction.
catalyst
the percentage of oxygen in the atmosphere
21
It is a mixture of different gases that surround the earth
Atmosphere
Represents 78% of the atmosphere
Nitrogen
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