Final answer:
Chloroethane, CH₃CH₂Cl, would be expected to have a nonzero dipole moment. XeF₄, BF₃, and Cl₂O would be expected to have a dipole moment of zero.
Step-by-step explanation:
A nonzero dipole moment occurs when a molecule has an unequal distribution of charge, resulting in a positive and negative end. In this case, the molecule Chloroethane, CH₃CH₂Cl, would be expected to have a nonzero dipole moment. This is because the chlorine atom is more electronegative than the carbon and hydrogen atoms, causing the electrons to be more strongly attracted to the chlorine atom and creating a partial negative charge on the chlorine and a partial positive charge on the carbon and hydrogen.
On the other hand, XeF₄, BF₃, and Cl₂O would be expected to have a dipole moment of zero. XeF₄ is a symmetrical molecule with four fluorine atoms surrounding the central xenon atom, resulting in a cancelation of dipole moments. BF₃ is also a symmetrical molecule with three fluorine atoms surrounding a central boron atom, resulting in a dipole moment of zero. Cl₂O is a linear molecule with two chlorine atoms bonded to an oxygen atom, and the dipole moments of the two Cl-O bonds cancel each other out, resulting in a dipole moment of zero.