Answer:
Explanation:
Zero Nitrogen Atoms
N is Nitrogen and you can see the last option C12H26 has no N. So it goes in the first box.
One Nitrogen Atom
C6H11NO2 and C10H12NO have 1 nitrogen atom so the 3rd and 4th option go in the 2nd box.
Two Nitrogen Atoms
The first option, C11H12N2O2 is the only one with 2 Nitrogen atoms and goes in box 3.
Three Nitrogen Atoms
Option 2, C7H11N3O is the only option with 3 Nitrogen atoms and goes in box 4.
