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Grade 12th passPhysical Chemistry

Mole fraction of I2 in C6H6 is 0.2.Molality of I2 in C6H6 is
Ans-3.2m(please sir reply soon)

Profile image of Kaushki
7 Years agoGrade 12th pass
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1 Answer

Profile image of Khimraj
7 Years ago

Let us start of with an assumption: we have ten moles of the given solution. Therefore we have 2 moles of iodine dissolved in 8 moles of benzene.

Molecular mass of benzene=78.

Molality=π‘π‘œ.π‘šπ‘œπ‘™π‘’π‘ π‘œπ‘“π‘–π‘œπ‘‘π‘–π‘›π‘’/π‘€π‘Žπ‘ π‘ π‘œπ‘“π‘ π‘œπ‘™π‘£π‘’π‘›π‘‘π‘–π‘›π‘˜π‘”

Therefore 8 moles of benzene weighs 78βˆ—8=624grams

Molality=(2βˆ—1000)/624 =3.205

That's your answer

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