Question

what kind of intermolecular forces act between a hydrogen fluoride molecule and an ammonia molecule? note: if there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.

Explanation:

Hydrogen fluoride ($HF$) and ammonia ($NH_3$) are polar - covalent molecules. Dipole - dipole forces occur between polar molecules. Also, hydrogen bonding is a special type of dipole - dipole force that occurs when hydrogen is bonded to a highly electronegative atom (F, O, N). In the case of $HF$ and $NH_3$, hydrogen bonding can occur due to the presence of H bonded to F in $HF$ and H bonded to N in $NH_3$. London dispersion forces are present between all molecules, including polar ones.

Answer:

London dispersion forces, dipole - dipole forces, hydrogen bonding