Answer:
a. 2954g of FeS
b. 1143g of FeS
Explanation:
Based on the reaction:
8 Fe + S₈ → 8 FeS
8 moles of Fe reacts with 1 mole of S₈ to produce 8 moles of FeS
a. 4.2mol sulfur produce:
4.2mol S₈ × ( 8 mol FeS / 1 mol S₈) = 33.6mol FeS. As molar mass of FeS is 87.92g/mol, mass is:
33.6mol FeS × ( 87.92g / 1 mol FeS) = 2954g of FeS
b. 13mol Fe produce:
13mol Fe × ( 8 mol FeS / 8 mol Fe) = 13mol FeS. In mass:
13 mol FeS × ( 87.92g / 1 mol FeS) = 1143g of FeS
