A given initial mass of KClO(3) on 50% d...

A given initial mass of `KClO_(3)` on 50% decompostion produces 67.2 litre oxygen gas at `0^(@)C` and 1 atm. The other product of decompostion is KCl. The initial mass of `KClO_(3)` (in gm) taken is:

245

122.5

490

none of these

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