Electrolysis of a solution containing an unknown metal ion with a +3 charge deposited 0.159 g of the metal on the cathode over a period of 2.00 minutes at a constant current of 2.00 A. What is the molecular weight of the unknown.
a. 128 g/mol
b. 63.9 g/mol
c. 192 g/mol
d. 21.3 g/mol
e. 207 g/mol