Fe +S =Fes. Calculate the mass in g of iron sulphide formed when 28g of iron combines with 16g of sulphur.

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Solution

According to the law of conservaion of mass,
total mass of reactants = total mass of products
So, 28g of iron reacts with 16g of sulphur to form 44g of iron sulphide.

Also, note here that iron and sulphur react in the ratio 1:1 and that half moles of both iron and sulphur are taken, So the reaction will be complete.

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