The dipole moment (μ) of hbr (a polar covalent molecule) is 0.838d (debye), and its percent ionic character is 12.4 % . estimate the bond length of the h−br bond in picometers.
note that
1 d=3.34×10−30 c⋅m and
in a bond with 100% ionic character, q=1.6×10−19 c.

When two electrical charges, of opposite sign and equal magnitude, are separated by a distance, a dipole is established. The size of a dipole is measured by its dipole moment (μμ). Dipole moment is measured in Debye units, which is equal to the distance between the charges multiplied by the charge (1 Debye equals 3.34×10−30Cm3.34×10−30Cm). The dipole moment of a molecule can be calculated by Equation 1.11.1:

μ = qr

where

r = μ/q

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