Question

mole fraction of solvent in aqueous solution of NaOH having molarity 3 is

Answer 1

hope it helps u.
Molality means moles of solute per kg of solvent
thus 3 molal solution means 3 moles of NaOh in 1 kg of water
no of moles of h20=(1000/18)=55.56

mole fraction= (moles of NaOH)/(Moles of NaOH+moles of Water)
=3/ (3+55.56)
=0.0512

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Answer 2

3/3+1/22.4 so x = 0.985