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2 December, 08:08

During an investigation, a scientist heated 123.6 g of copper carbonate till it decomposed to form a black residue. The total mass of the black residue formed was 79.6 g. Does the law of conservation of mass hold true in this case?

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  1. 2 December, 09:01
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    No it does not. This is the answer because the Law Of Conservation Of Mass says that mass remains constant during the change. As you can see, the mass was 123.6g, and it is now 79.6 g.
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