A 5,012 g sample of pure iron chloride hydrate salt was dried in an oven. The mass of the anhydrous compound was 3.195g. The compound was then dissolved in water and reacted with an excess of AgNO,.

What is the percentage of water in the original compound?

a. 94.1%
b. 63.7%
c. 84.1%
d. 36.3%