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Cathode: O₂ + 4H⁺ + 4e⁻ → 2H₂O . Moles O₂ = (0.56/22.4) = 0.025 mol , Moles H₂O = 0.025 × 2 = 0.05 mol . Mass = 0.05 × 18 = 0.9 g .
Ref: NCERT Class 12 Chemistry > Chapter 2: Electrochemistry > Topic: Batteries - Primary Secondary and Fuel Cells
Oxygen is directly used in the Electron Transport Chain as the final electron acceptor, forming water.
Ref: NCERT Class 11 Biology Chapter 12: Respiration in Plants Krebs Cycle - TCA Cycle - Tricarboxylic Acid Cycle
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