How many grams of `KClO_3` must be decomposed to prepare `3.36` litres of oxygen at STP? (Atomic weight of `K = 39, Cl

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Q 3142756633.     How many grams of `KClO_3` must be decomposed
to prepare `3.36` litres of oxygen at STP?
(Atomic weight of `K = 39, Cl = 35.5, O = 16 u`)

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