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REDOX REACTIONS AND ELECTROCHEMISTRY
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What is the correct half-reaction for the oxidation of sodium in 4Na(s) + O₂(g) → 2Na₂O(s)?
A. 2Na + 2e⁻ → 2Na⁻
B. 4Na → 4Na⁺ + 4e⁻
C. 2Na → 2Na⁺ + e⁻
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