a hydrated iron chloride compound was found to contain 20.66% Fe, 39.35% Cl, and 39.99% water, determine the empirical formula of this hydrated compound

Answer 1

assume 100 grams
20.66 grams Fe=xxx moles Fe
39.35 frams Cl=yyy moles Cl
39.44 grams water=zzz moles H2O

determine xxx,yyyy,zzzz
then divide all be the lowest of the three.

the resultant numbers should give you the subscripts

Answer 2

FeCl2*2h2o