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Calculate the mass percent of the differ...

Calculate the mass percent of the different elements present in sodium sulphate `(Na_(2)SO_(4))`.

Text Solution

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Molecular weight of `Na_(2)SO_(4)` = 142
142 gm of `Na_(2)SO_(4)` contain 46 gms of sodium
`therefore` 100 gm of `Na_(2)SO_(4)` contain `(100xx46)/142=32.38%`
142 gm of `Na_(2)SO_(4)` contain 32 gm of sulphur
`therefore` 100 gm of `Na_(2)SO_(4)` contain `(100xx32)/142=22.54%`
142 gm of `Na_(2)SO_(4)` contain 64 gm of oxygen
`therefore` 100 gm of `Na_(2)SO_(4)` contain `(100xx64)/142=45.08%`
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