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Laws of Chemical Combination

copper oxide ...

Question

copper oxide obtained by heating copper carbonate contains copper and oxygen in the same ratio by mass. which law is stated

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Solution

CuCO₃ $\to$ CuO + CO₂
This is 'LAW OF DEFINITE PROPORTIONS" . This explains that the composition of element in a compound is always in same ratio by mass and is independent from source of preparation.

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