Which of the following gases was the least abundant in the earth's atmosphere 3.5 billion years ago? a) carbon dioxide b) nitrogen c) oxygen d) hydrogen e) water vapor - QAmmunity.org

Which of the following gases was the least abundant in the earth's atmosphere 3.5 billion years ago? a) carbon dioxide b) nitrogen c) oxygen d) hydrogen e) water vapor

asked Oct 13, 2023 145k views

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