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4.50g of a sample of an oxide of copper on reduction gave 4.0g of copper,...

4.50g of a sample of an oxide of copper on reduction gave 4.0g of copper, 5g of another oxide of copper on reduction also gave 4g of copper. These result are in accordance with the law of?
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Asked by Arisekola Justina Love on 30th June, 2014
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