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Galena is reported to have 23.8% PbS. Ca...

Galena is reported to have `23.8% PbS`. Calculate the volume of oxygen required at STP to roast `10 kg` galena to `PbO` and `SO_(2)`.

Text Solution

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`underset(2xx238)(2PbS)+underset(3xx32)(3O_(2))to2PbO+2SO_(2)`
`476g` of `PbS` requires `=96g"of"O_(2)`
`10000xx(23.8)/(100)gPbS"requires"=480g"ofO_(2)`
`"mole of" O_(2)=(480)/(32)=15`
`:.` volume of oxygen at S.T.P `=15xx22.4=336` litres
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