19. How many minutes will it take to plate out 2.19 g of chromium metal from a solution of Cr3+ using a current of 35.2 amps in an electrolyte cell?
a) 1.92 b) 5.77 c) 346 d) 115 e) 17.3
20. How many grams of Ca metal are produced by the electrolysis of molten CaBr2 using a current of 30.0 amp for 10.0 hours?
a) 112 b) 448 c) 0.0622 d) 224 e) 22.4