To solve this problem, we need to use the following equation:moles = coulombs / Faraday constant * n where:- moles represent the number of moles of copper Cu - coulombs represent the amount of electricity used 4000 C - Faraday constant F is approximately 96485 C/mol- n is the number of electrons transferred in the redox reactionFor copper, the redox reaction is:Cu s Cu aq + 2eIn this reaction, copper loses 2 electrons n = 2 to form Cu ions.Now, we can plug the values into the equation:moles = 4000 C / 96485 C/mol * 2 moles = 4000 / 192970moles 0.0207Therefore, there are approximately 0.0207 moles of copper in the sample.