Mole fration of a solute in 2.0 molal aqueous solutions is :
Mole fration of a solute in 2.0 molal aqueous solutions is :
A. 1.77
B. 1.87
C. 0.0347
D. 0.347
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Correct Answer - c
`"Mole fraction of solute"(X_(B))=n_(B)/(n_(B)+n_(A))`
`"No, of moles of solute"(n_(B))=2 mol`
`"No. of moels of water"(n_(A))=((1000g))/((18g mol^(-1)))`
=55.55 mol
`X_(B)=((2 mol))/((57.55 mol))=0.0347`
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