Question

75g of sodium chloride is dissolved in 200g of water calculate the mole fraction of Back and H2o
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Answer 1

Answer:

The answer is 6.25cm

Explanation:

molality= kilograms of solvent/moles of solute moles of NaOH= Mass of NaOHWeight of NaOH

NaOH = 25/40

= 5/8

=0.625

=0.625kilograms of H2O=Weight of H2O/1000 =100/1000

=0.1

=0.1∴molality= moles of solute/kilograms of solvent

= 0.625/0.1

=6.25m

=6.25mHence, the correct answer is 6.25.