write the amount of Oxygen gas present in the atmosphere
option1- 78
option2-20
option3-20. 5
option4-1
Answers
Answered by
0
Answer:
The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen
Explanation:
Answered by
1
Answer:
option3 - 20.5
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