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Question
Nitrogen constitutes nearly ____ % of the atmosphere.
Nitrogen constitutes nearly ____ % of the atmosphere.
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Solution
The correct option is D 78
Air is a mixture of gases. It contains about 78% nitrogen, 21% oxygen, 0.04% carbon dioxide, and very small amounts of other gases.
Air is a mixture of gases. It contains about 78% nitrogen, 21% oxygen, 0.04% carbon dioxide, and very small amounts of other gases.
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