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Question
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
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Solution
Brass and bronze are mixtures as the composition of elements are not fixed by mass and has no formula.
Lead nitrate and copper sulphate are compounds as they have a fixed ratio of elements by mass and have a formula like Pb[NO3]2 and CuSO4.
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