what mass of copper could be electroplated on the cathode in an experiment where an average of 200 mA was passed through the cell for 35 minutes?
charge (q) = current (I) x time
q = (0.2A)(35×60)
q = 420 C
420C x (1mol e-/96485 C) x (1 mol Cu / 2 mol e-) x (63.5 g / 1 mol Cu) = 0.138 grams Cu