Chemistry Forum

Can someone PLEASE help me out with the following questions, I have no idea what it is asking let alone how to come up with an answer. I would appreciate it, thanks!

For the salt FeCl₃.6H₂O, calculate the percent mass loss if the salt decomposed by
a. simple loss of water
b. Typical decomposition of a hydrated salt with a 3+cation.[/b]

Obviously, the reaction is FeCl₃.6H₂O = FeCl₃ + 6H₂O
Now canculate molecular weights of FeCl₃.6H₂O and anhydrous FeCl₃
The difference is the water loss.