Which of the following molecules has a net dipole moment of zero?

Name: Which of the following molecules has a net dipole moment of zero?
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Question

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In order for a molecule to have a net dipole moment of zero, the individual dipole moments of each bond must cancel out. In choices A, C, D, and E, there are clearly polar bonds present, so these molecules have a net dipole moment. In choice B, all of the bonds are nonpolar, so the molecule overall has a net dipole moment of zero.

Which of the Following Molecules Has a Net Dipole Moment