Final answer:
The molecule with the greatest dipole moment is HCl (hydrochloric acid).
Step-by-step explanation:
The molecule with the greatest dipole moment is HCl (hydrochloric acid). This is because chlorine (Cl) is more electronegative than hydrogen (H), resulting in an unequal sharing of electrons and a polar bond. This polarity leads to a significant dipole moment in HCl.
Looking at these substances, we see that water (H2O) has the best dipole second. This is on the grounds that the oxygen molecule (O) in water is more electronegative than different iotas in different substances referenced. Additionally, an unequal distribution of charge within the molecule is created by water's bent geometry, which increases the dipole moment.
In synopsis, among the substances referenced, H2O (water) has the best dipole second because of the blend of higher electronegativity and the twisted sub-atomic math.