Question

When iron is heated in a steam of dry chlorine, it produce a chloride which contains 34.5 % by mass of iron which contains 65.5 % calculate the empirical formula of this chloride

Answer 1

If the compound is Fe_{_x}Cl_{_y}

Then
57x/(57x+35.5y) = 0.345
35.5y/(57x+35.5y) = 0.655
I get y = 3x
That is, FeCl_₃