A) argon
B) carbon dioxide
C) some \[{{N}_{3}}\] molecules analogous to \[{{O}_{3}}\].
D) greater amount of \[{{N}_{2}}\] molecules derived from N-15 isotope.
Correct Answer: A
Solution :
[a] Air contains about 1% inert gases, mainly Ar. (At.wt 40) The atomic wt. of \[{{N}_{2}}\] is 28.
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