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On being heated in oxygen, 3.120 g of a ...

On being heated in oxygen, `3.120 g` of a metal `M` convert to `4.560 g` of oxide. Fine the valency of metal ( at.wt. of metal `=52`).

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The correct Answer is:
3
Wt.of oxygen react `=4.560-3.120=1.44g`
`therefore` Eq.wt.of metal `=(3.12)/(1.44)xx8=17.33`
`therefore` Valency of metal `=(52)/(17.33)=3`
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