Question

How many oxygen in world?
How many other gass in world?​

Answer 1

Answer:

oxygen is 21 percent

nitrogen is 79 percent and carbon dioxide is 0.4 percent

Answer 2

αɳʂɯҽɾ

While oxygen is necessary for most life on Earth, the majority of Earth's atmosphere is not oxygen. Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases