What is the mass percent of sodium chloride?

Question

A 0.8000 g sample of impure sodium choride is dissolved in water, and the chloride is precipitated with excess silver nitrate, producing 1.000 g of silver chloride. What is the mass percent of sodium chloride in the original impure sample?

a. ) 40.77
b. ) 24.74
c. ) 50.97
d. ) 80.00
e. ) 0.6977

I worked it out and I got e). Is that correct?

Answer 1

Atomic weights: Ag=108 Cl=35.5 Na=23 AgCl=143.5 NaCl=58.5

NaCl + AgNO3 ===> AgCl + NaNO3

1.000gAgCl x 1molAgCl/143.5gAgCl x 1molNaCl/1molAgCl x 58.5gNaCl/1molNaCl = 0.4077g NaCl

0.4077/0.8000 x 100% = 50.96%

Looks like c.)

Answer 2

1.51 g/ml x 10^-3 Kg/g x 10^-3 L/ml x 6 x 10^20 L = 9.06 x 10^14 Kg salt