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Which of the following gases was most likely present in earths earliest atmosphere

Which of the following gases was most likely present in earths earliest atmosphere
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1 vote
Which of the following gases was most likely present in earths earliest atmosphere

asked
User Nybon
by
7.9k points

2 Answers

7 votes

Oxygen, because water must have been present when Earth first formed.

answered
User AmdY
by
7.7k points
5 votes

the correct answer is hydrogen

answered
User Owen Cao
by
8.4k points
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