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The mass of one litre sample of ozonised...

The mass of one litre sample of ozonised oxygen at `NTP` was found to be `1.5 g`. When `100 mL` of this mixture at `NTP` were treated with terpentine oil, the volume was reduced to `90 mL`. Hence calculate the molecular mass of ozone.
(Terpentine oil absorbs ozone)

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The correct Answer is:
`48.2` ;
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