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Near the earth’s surface, ____ occupies about 78% and ____ about 21% of the total volume of dry air.
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Near the earth’s surface, ____ occupies about 78% and ____ about 21% of the total volume of dry air.
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Near the earth’s surface, ____ occupies about 78% and ____ about 21% of the total volume of dry air.
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78% would be nitrogen. 21% would be oxygen.
Javier Vidal
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Jun 2, 2018
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