What molecules has a zero dipole moment?

Nonpolar molecules

Explanation:

Nonpolar molecules are those molecules that are produced by the union between atoms that have equal electronegativity, so the forces with which the atoms that make up the molecule attract the electrons of the bond are equal, thus causing the cancellation of these forces. An example of an nonpolar molecule is the Oxygen (O2) molecule. In this molecule each oxygen atom attracts the electrons shared towards itself with the same intensity but in opposite directions, therefore the forces of attraction are annulled and the molecule does not become a dipole.