2 samples of iron 2 sulphate FeS where prepared by:heating a mixture of iron fillings and sulphate, passing hydrogen sulphide gas into a solution of iron 2 chloride. Analysis to both samples of iron 2 sulphide showed that in 0.8g of Sulphur combined with 1.4g of iron, while in B 5.50g of iron 2 sulphide contains 2.0g of Sulphur.Show that this result illustrates the law of constant composition