Current Time 1.027 (A) 30mins e == N Initial Mass Mi 13.2 g Final Mass Me 13.8g Analysis of Data The change in the mass of the cathode is: AM = = Mi = initial mass, Mf= final mass. Number of moles of Cu++ ions plated on the cathode is: AN = Mf - Mi atomic weight of copper 63.54 (grams) Number of electrons used is N = 2 x ANX NA, where NA = 6.02 x 1023 atoms/mo the Avogadro Number. The charge used is: Q = (current) x (time) =It The charge of the electron is (in magnitude)