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(C) The Law of Multiple Proportions states that when two elements combine to form more than one compound,the masses of one element that combine with a

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$CuO, Cu_2O$

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(C) The Law of Multiple Proportions states that when two elements combine to form more than one compound,the masses of one element that combine with a fixed mass of the other are in the ratio of small whole numbers.In $CuO$ and $Cu_2O$:For $CuO$: $63.5 \ g$ of $Cu$ combines with $16 \ g$ of $O$.For $Cu_2O$: $127 \ g$ of $Cu$ combines with $16 \ g$ of $O$,which means $63.5 \ g$ of $Cu$ combines with $8 \ g$ of $O$.The ratio of the masses of oxygen combining with a fixed mass $(63.5 \ g)$ of copper is $16:8$,which simplifies to $2:1$,a simple whole number ratio.Therefore,$CuO$ and $Cu_2O$ illustrate the Law of Multiple Proportions.

Which of the following examples illustrates the Law of Multiple Proportions?

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