A. 70% nitrogen
B. 50% nitrogen
C. 78% nitrogen
D. None of the above
Correct Answer: 78% nitrogen ✔
Last Updated: March 30, 2019
A. 70% nitrogen
B. 50% nitrogen
C. 78% nitrogen
D. None of the above
Correct Answer: 78% nitrogen ✔
Last Updated: March 30, 2019