Density of 3 M solution of NaCl is 1.25 ~g / mL . The mass of the solvent in the solution is

Step-by-step solution

aligned & d=1.25 ~g / mL , conc. of solution =3 M &=3 moles in one litre of the solution. & Molar mass of NaCl =23+35.5=58.5 ~g ~mol ⁻¹ & Volume of solution =1 ~L =1000 ~mL & Mass of solution =d V &=1.25 ~g ~mL ⁻¹ 1000 ~mL =1250 ~g & Mass of solute ( NaCl )=n molar mass &=3 58.5=175.5 ~g & Mass of solvent = mass of solution - mass of solute &=1250-175.5=1074.5 ~g aligned