adasia22 adasia22

18-01-2019
Biology

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the gas that makes up about 21 percent of the atmosphere is ?

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Faithbar5 Faithbar5

18-01-2019

the gas that makes up 21 percent of the atmosphere is oxygen

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jasmynromerop7b6jf jasmynromerop7b6jf

18-01-2019

the gas that makes up about 21% of the atmosphere is oxygen !

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