Question

Calculate the mole-fraction of solute in 2.5 of aqueoussolution

Answer 1

.5 molal aqueous solution means 2.5 moles of solute in 1 kg solvent(water)

so, moles of solute=2.5

moles of water=1000/18=55.55(approx)

so mole fraction = 2.5/(2.5+55.55)=.043