Q.

The density of a 56.0% by weight aqueous solution of 1-propanol (CH3CH2CH2OH) is 0.8975 g/cm3. What is the mole fraction of the compound ?

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a

0.292

b

0.227

c

0.241

d

0.276

answer is D.

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Detailed Solution

Mass of solution =100 gMass of solute = 56 g moles of solute =5660=0.93Mass of solvent = 44 gmoles of solvent = =4418=2.44XSolute =0.930.93+2.44=0.933.37=0.276
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The density of a 56.0% by weight aqueous solution of 1-propanol (CH3CH2CH2OH) is 0.8975 g/cm3. What is the mole fraction of the compound ?