12. An aqueous solution of gold(III) nitride, Au(NO₃)₃, was electrolyzed with a current of0.0250A until 1.200g of Au (atomic weight 197.0) had been deposited at the cathode. Calculate the quantity of electricity passed.

[Hint: The reaction at the cathode is 3e^- + Au³⁺ → Au; The equation for the libration of O₂ is 2H₂O→O₂+4H⁺ +4e^-]
(A)1.76 C,
(B) 17.6C,
(C) 176C,
(D) 1,760C,
(E) 17,600C

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