Calculate the mass of FeS, which can be obtained by the interaction of 7 grams

Calculate the mass of FeS, which can be obtained by the interaction of 7 grams of iron containing 5% impurities with sulfur.

1. The reaction equation for the production of iron sulfide (2):

Fe + S = FeS;

2. find the mass of pure iron:

m (Fe) = (1 – w (impurities)) * m (sample) = 0.95 * 7 = 6.65 g;

3.Calculate the chemical amounts of iron and its sulfide:

n (Fe) = m (Fe): M (Fe) = 6.65: 56 = 0.11875 mol;

n (FeS) = n (Fe) = 0.11875 mol;

4.calculate the mass of sulfide:

m (FeS) = n (FeS) * M (FeS);

M (FeS) = 56 + 32 = 88 g / mol;

m (FeS) = 0.11875 * 88 = 10.45 g.

Answer: 10.45 g.