Calculate the mass and amount of the sulfur substance that has reacted with iron, if this results in 44 g of iron (II) sulfide.

Let’s compose the equation for the reaction of the interaction of sulfur with iron:
Fe + S = FeS;
Let’s calculate the molecular weight of iron sulfide:
56 + 32 = 88 g / mol;
Let’s calculate the amount of substance in iron sulfide:
44/88 = 0.5 mol;
The amount of substance in sulfur is 0.5 mol, since the same coefficients are in front of sulfur and before iron sulfide. Let’s find the mass of sulfur:
0.5 * 32 = 16 grams;
Answer: the amount of substance in sulfur is 0.5 mol, the mass of sulfur is 16 grams.