The correct answer for this question is this one: "2.7×10^-30 C·m "
We have + H -- Br -
The percent ionic character of the HBr bond is about 13%
Percent ionic char = 100(1 - e^(-ΔEN²/4))
1D = 3.33564×10^-30 C·m
0.80D = 2.7×10^-30 C·m
We have to take note to use two significant digits.
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