Which of the following has zero dipole moment? explain to me how to determine the answer. a. \(nh_3\). b. \(no_2\). c. \(pf_5\). d. \(hcn\)

PF5

has a zero dipole moment as it doesn't have a lone pair of electrons. the geometry is trigonal bipyramidal. The axial P-F bonds "cancel" each other. The equatorial P-F bonds are oriented as trigonal planar, so those three (like in BF3) "cancel" as well.

Dipole moment of a compound is different from the dipole moment of a bond. You need to look at ALL bonds for the overall dipole moment of a molecule.

Dsolubility let me know if you have any other questions for chemistry