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Find the % labeiling of 100gm oleum samp...

Find the % labeiling of `100gm` oleum sample if it contains `20gm SO_(3)` .

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`%` labelling of oleum sample `= (100 + x) %`
`{:(SO_(3),+,H_(2)Orarr,H_(2)SO_(4),),(20gm,,,,),(1//4"mole",,1//4"mole",,):}`
`4.5gm`
`:. %` labelling of oleum sample `= (100 + 4.5) % = 104.5%` .
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