Which of the following molecules has a zero dipole moment? (a) SO3 (b) SO2 (c) H2S (d) CO2
Understand the Problem
The question asks which of the given molecules (SO3, SO2, H2S, CO2) has a dipole moment of zero. To determine this, you need to consider the molecular geometry and the electronegativity differences between the atoms in each molecule. A molecule with a symmetrical shape and symmetrical distribution of polar bonds will have a zero dipole moment.
Answer
The molecule with a zero dipole moment is (a) SO3.
Molecules with a zero dipole moment are symmetrical; therefore, the answer is (a) SO3.
Answer for screen readers
Molecules with a zero dipole moment are symmetrical; therefore, the answer is (a) SO3.
More Information
A molecule with zero dipole moment generally has a symmetrical structure where the bond dipoles cancel each other out, resulting in no net dipole moment.
Tips
A common mistake is thinking that any molecule with polar bonds will have a dipole moment, but the geometry of the molecule is also important.
Sources
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