Calculate the quantity indicated for each of the following electrolyses. Enter scientific notation as 1.23E4. (a) [Cu2+] remaining in 5.70E2 mL of a solution that was originally 0.412 M CuSO4, after passage of 3.50 A for 289 s and the deposition of Cu at the cathode. ____________ (b) The time required to reduce [Ag+] in 179 mL of AgNO3(aq) from 0.177 to 0.145 M by electrolyzing the solution between Pt electrodes with a current of 1.02 A.