On analysis it was found that the black oxide of Cu ,red oxide of Cu, litharge, the red oxide of Pb & peroxide of Pb contains 79.9%,88.8%,92.8%,90.6%,86.6% respectively of metal .Establish the law of multiple proportion?.

On analysis it was found that the black oxide of Cu ,red oxide of Cu,

1.	On analysis it was found that the black oxide of Cu ,red oxide of Cu, litharge, the red oxide of Pb & peroxide of Pb contains 79.9%,88.8%,92.8%,90.6%,86.6% respectively of metal .Establish the law of multiple proportion?.
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