Question

If 12g urea(NH2CONH2) is dissolved in 90g of water, the mole fraction of solute is:

Answer 1

Answer:

mole fraction of glucose= no. of moles glucose/no.moles of glucose+ no.moles of urea

no. moles of glucose= w/mw

=90/180 (molar mass of

=0.5

no. moles of urea= 30/60(molar mass of

urea=60)

=0.5

glucose=180)

5.0

therefore,

mole fraction of glucose= 0.5/0.5+0.5

=0.5

Explanation:

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Answer 2

The mole fraction of urea then is: 0.5 / (10 + 0.5) = 1 / 21 The mole ... of the solution when 120 g urea is dissolved in 1000 g of water..