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Copper forms two oxides following law of...

Copper forms two oxides following law of variable proportions. One gram of each oxide in hydrogen gas gave 0.799 g and 0.888 g of the metal respectively. Give the composition of these oxides.

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Oxide(A) : wt of copper = 0.799g
wt of oxygen =0.21g
wt of metal per gram of oxygen =3.97g
Oxide(B) : wt of copper =0.888g
wt of oxygen =0.112g
wt of meta per gram of oxygen = 7.93g
The ratio of weights of metals reacting with same weight of oxygen =1:2
The oxides are CuO and `Cu_(2)O`
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