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Electrolysis of a solution

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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)
207 g/mol
B)
192 g/mol
C)
128 g/mol
D)
21.3 g/mol
E)
63.9 g/mol

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This solution helps with a problem regarding electrolysis of a solution.

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mass of metal liberated, m = (I*t*M)/ (F*z)
I = current (A), t = ...

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