Fe + S ----> FeS moles of Fe = 9.42/56 = 0.1682 moles of S = 8.5/32 = 0.265625 here Fe is limiting so, all the Fe will react to form same amount of FeS as Fe. S0, amount of FeS = 0.1682moles mass of FeS = 0.1682*88 = 14.8g Solution Fe + S ----> FeS moles of Fe = 9.42/56 = 0.1682 moles of S = 8.5/32 = 0.265625 here Fe is limiting so, all the Fe will react to form same amount of FeS as Fe. S0, amount of FeS = 0.1682moles mass of FeS = 0.1682*88 = 14.8g.