(a) How many coulombs are required to plate a layer of chromium metal 0.25 mm thick on an auto bumper with
a total area of 0.32 m2 from a solution containing CrO42-? The density of chromium metal is 7.20 g/cm3.
(b) What current flow is required for this electroplating if the bumper is to be plated in 14.1 s ?
(c) If the external source has an emf of + 6.1 V and the electrolytic cell is 66 % efficient, how much electrical energy is expended to electroplate the bumper?