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Q 1260467315.     `1` gm sample of `KClO_3` was heated under such condition that a part of it decomposed according to the equation
`(1) 2 KClO_3 -> 2KCl + 3O_2`
and remaining underwent change according to the equestion .
`(2) 4KClO_3 -> 3KClO_4 + KCl`
If the amount of `O_2` evolved was `112` ml at `1` atm and `273` K . Calculate the `%` by weight of `KClO_4` in the resideue
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)