What is the percent ionic character of the H−Br bond?
Express your answer numerically to three significant figures.
The dipole moment for a bond is a measure of the magnitude of polarity (how polar the bond is). Dipole moments can be used to calculate percent ionic character.
The dipole moment is symbolized by μ (Greek lowercase "mu") and is equal to the charge, Q, of the atoms (measured in Coulombs, C) times the distance, r, of separation between the atoms (measured in meters, m):
μ = Q × r
Therefore, the units of dipole moment are Coulomb-meters, C⋅m. Another unit of dipole moment is the debeye, D:
1 D = 3.34 × 10−30 C⋅m
The percent ionic character is calculated by dividing the charge, Q, by the charge on a single electron, 1.60×10−19 C⋅m.
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