2. During the electrolysis of a solution of a given metal salt with a current of I, A, the mass of the cathode increased by m g. Considering that the metal current yield is Bi, %, calculate how much electricity was passed and for how long. Draw up an electrolysis diagram.
Salt formula I, A m, g Bi(Me), %,
FeCl2 0.9 0.77 61

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