What explains why ammonia, $\text{NH}_3$, has a higher boiling point than phosphine, $\text{PH}_3$?
- AAmmonia molecules are polar; phosphine molecules are not.
- BAmmonia molecules have significant hydrogen bonding; phosphine molecules do not.
- C$\text{N-H}$ covalent bonds are stronger than $\text{P-H}$ covalent bonds.
- DThere is one lone pair in each ammonia molecule but no lone pair in each phosphine molecule.