Percentage of oxygen in air by volume ………………
Percentage of oxygen in air by volume ………………
A) 20.9%
B) 78.1%
C) 0.03%
D) 0.1%
4 views
Percentage of oxygen in air by volume ………………
A) 20.9%
B) 78.1%
C) 0.03%
D) 0.1%