Question

120g of urea is dissolved in 324 ml of water.calculate mole fraction of urea in the solution​

Answer 1

Answer:

The correct answer is 1/9.

Urea = NH4N20

Mass = 60g

.: n=m/M

n=120/60

n=2moles.

Now,

Water = H2O

Mass =18g

n=m/M

n=324/18

n=18moles

now,

fraction= 2/18

= 1/9

here,

n=No. of moles

m=Given mass in question

M=Gram molecular mass of substance

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