Question

aqueous sodium hydroxide solution is labelled as 10% by weight mole fraction of solute in it

Answer 1

10%NaOh means 10g of NaOh is present in 90 g of solvent so moles of NaOH
10÷39.9= 0.250
moles of H2O = 90÷18.01=1.054
mole fraction =0.250÷(0.250+1.054)=0.1917M