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Model of HCl molecule

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Model of HCl molecule. See attached file for full problem description.

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centerline{bf HCl}

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Given potential
$$
V(r) = -{e^2over 4piepsilon_0 r} + {Aover r^9},
$$
where A is to be determined.

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Answers to questions:

(a) The minimum of the potential is where its derivative with respect to r is zero:
$$
V' = {e^2over 4piepsilon_0 r^2} - {9Aover r^{10}} = 0
$$
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