Final answer:
Ammonium chloride can be obtained through sublimation, copper (II) oxide can be obtained by reduction, and sodium chloride can be obtained by dissolving the mixture in water and evaporating the solution.
Explanation:
Ammonium chloride can be obtained from the mixture by sublimation since ammonium chloride sublimes when heated. Copper (II) oxide can be obtained by reducing it with a suitable reducing agent like carbon. Sodium chloride can be obtained by dissolving the mixture in water, filtering out the insoluble copper (II) oxide, and then evaporating the water to obtain solid sodium chloride crystals.
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