Question

write the amount of Oxygen gas present in the atmosphere
option1- 78
option2-20
option3-20. 5
option4-1​

Answer 1

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:

Answer 2

Answer:

option3 - 20.5

Mark me Brainliest!!

: )