Summing all bond dipole moments for a structure gives the molecule’s net dipole moment....

Summing all bond dipole moments for a structure gives the molecule’s net dipole moment. If this net dipole moment is zero, the molecule is overall nonpolar. (We will not be doing fancy vector calculations in this course, but be on the lookout for symmetrical molecules whose bond dipole arrows cancel each other.) Circle the only overall nonpolar molecule shown in Figure 4.5.

(Reference Figure 4.5)