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What is the volume of oxygen liberated a...

What is the volume of oxygen liberated at `S.T.P` When 3.4g of `H_(2)O_(2)` is heated?

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`2H_(2)O_(2)to2H_(2)O+O_(2)`
`2"moles" " " 1 "mole"`
`2xx34 = 68gm` 22.4lt as S.T.P
From the blanced equation , we can say that 68g of `H_(2)O_(2)` on complete decomposition liberates `(22.4)/(68)xx3.4 =1.12 lit`.
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