Hard Question!?

Question

If a chemistry instructor combines and heats the mixture of iron and sulfur in an open crucible, a chemical reaction takes place and the elements combine to formed iron (II) sulfide, which is not magnetic. First, write an unbalanced equation for this reaction. Then balance it. Finally, calculate the theoretical yield if 5.25 grams of iron is reacted with 6.93 grams of sulfur and the % composition of the newly formed compound. Note: some of the sulfur MIGHT be oxidized into sulfur dioxide in the reaction.

Answer 1

Fe + S -> FeS

Moles of Fe = 0.09375
Moles of S = 0.216

Moles of FeS = Moles of Fe