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In a galvanic cell, which half-reaction occurs at the anode?

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Q-00083098

Cu²⁺ + 2e⁻ → Cu(s)

Zn(s) → Zn²⁺ + 2e⁻

Zn²⁺ + 2e⁻ → Zn(s)

Cu(s) → Cu²⁺ + 2e⁻

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