What holds the molecules together in a sample of ammonia, nh3? a. dipole-dipole attraction b. polar covalent bond c. hydrogen bonding d. london dispersion?

b. Polar covalent bonds. The polar N-H bonds hold the NH3 molecules together. They are intramolecular forces of attraction within a molecule.

All the other options are wrong. They are intermolecular forces — the attractive forces between different molecules.

what is the question here. i think you messed up.