7. An electrolytic cell was constructed from zinc and copper half-cells. The equation of the reaction is shown below. Zn (s) + Cư“ (aq) → Zn²* (aq) + Cu (s) The observed voltage was found to be 1.00 V instead of the standard cell potential, F of 1.10 V. Which of the following accounts for this observation? A. The solutions in the half-cells had different volumes. B. The copper electrode was larger than the zinc electrode. C. The Zn* solution was more concentrated than the Cu²* solution. D. The Zn2* electrolyte was ZnSO4, while the Cu²* electrolyte was Cu(NO:)2-

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