59. Solving a chemistry problem

8. Weigh a mixture of NaCl and NaNO3 of chemically pure grade weighing 0.8180 g was dissolved in a volumetric flask with a capacity of 200.0 ml. For titration of 20.00 ml of solution, 18.35 ml of silver nitrate solution Т(AgNO3/KCl) = 0.003442 g/ml were used. Calculate the mass fraction (%) of NaCl and NaNO3 in the mixture.