CCL: a really silly question

From: "Richard Leo Wood" <rwoodphd_+_msn.com>
Subject: CCL: a really silly question
Date: Thu, 12 May 2016 09:51:58 -0400

 Sent to CCL by: "Richard Leo Wood" [rwoodphd ~~ msn.com]
 I am trying to compute the electrostatic interaction for a pair of atoms
 > from an energy minimized structure.
 I have the charges on the two atoms as -0.47 and -0.55.  They are 3.15
 Angstroms apart.  So, E = (-0.55*-0.45)e-38 C^2/3.15e-8 m.
 I get 8.21e-32 C^2/m.  My question is how do I convert this to Joules?
 Richard