Question

Oxygen and nitrogen gases comprise ___ percent of the atmosphere by volume.

21

50

78

99

Answer 1

well, Oxygen comprises at 20.95%​ and Nitrogen at 78.08%

Answer 2

@Brrandyn

Answer 3

so not sure

Answer 4

Hold on.

Answer 5

I think it is 99.

Answer 6

20.95%​ + 78.08% = 99.03

Answer 7

Yeah ^

Answer 8

answer is D.

Answer 9

Yes, Nitrogen and Oxygen comprises of nearly 99% of the Earth's atmosphere.

D.

Answer 10

Thank you!!