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Calculate the mass percentage of aspirin...

Calculate the mass percentage of aspirin `(C_(9)H_(8)O_(4))` in acetonitrile `(CHM_(3)CN)` when `6.5g` of `C_(9)H_(8)O_(4)` is dissolved in `450g` of `CHM_(3)CN`.

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The correct Answer is:
`1.424%`
Mass percentage of aspirin
`=(Mass of asp iri ng xx100)/(Mass of asp i r i n+Mass of CHM_(3)CN)`
`=(6.5)/(6.5+450)xx100`
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What will be the mass percentage of aspirin (C_(9)H_(8)O_(4)) in acetonitrile (CH_(3)CN) when 6.5 g of C_(9)H_(8)O_(4) is dissolved in 450 g of CH_(3)CN ?

C_(4)H_(8)O_(2) represents :-

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