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One litre of a sample of ozonized oxygen...

One litre of a sample of ozonized oxygen at `0^(@)C` and `1` atm on passing through a KI solution, liberated iodine which required `9ml` of a thiosulphate solution.A volume of `12ml` of a '5.675 volume'hydrogen peroxide solution liberated iodine from another iodide solution,which required `24ml` of the same thiosulphate solution.The volume percent of ozone in the ozonized oxygen sample is approximately

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