Answer
From left to right:
molecular: N2H4, empirical: NH2
molecular: N2H2, empirical NH
molecular: NH3, empirical NH3
Work Step by Step
Molecular formulas tell you how many atoms of each element are in a compound, and empirical formulas tell you the simplest or most reduced ratio of elements in a compound. From left to right we have N2H4, which we can reduce to NH2 by dividing by 2. Next we have N2H2, which we can reduce to NH by dividing by 2. Last we have NH3, which cannot be reduced.
