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10 g of an orgainc compound is dissolved...

10 g of an orgainc compound is dissolved per litre of the solution and gave an osmotic pressure of 1.18 atmosphere at 273 K. Calculate the molecular mass of compound.

Text Solution

Verified by Experts

The correct Answer is:
189.94 h `mol^(-1)`
`W_(B)=10g, V=1.0 L, pi=1.18" atm", T=273 K, R=0.0821" L atm K"^(-1)mol^(-1), M_(B)=?`
`M_(B)=(W_(B)xxRxxT)/(pixxV)=((10g)xx(0.0821"L atm K"^(-1)mol^(-1))xx(273 K))/((1.18"atm")xx(1L))=189.94" g mol"^(-1)`.
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