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18-06-2017
Biology

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Air, the gas most commonly used by recreational scuba divers, is composed of:

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teshiogami teshiogami

18-06-2017

78.09 % Nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide and a small percent of other gasses...(neon, helium, krypton, xenon, etc...)

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