Final answer:
0.136 moles of FeS will be formed from 7.62g of Fe.
Step-by-step explanation:
To determine how many grams of FeS are formed from 7.62g of Fe reacted with excess S, we need to use the balanced chemical equation for the reaction. The balanced equation is:
Fe + S → FeS
From the equation, we can see that the mole ratio between Fe and FeS is 1:1. Therefore, the number of moles of FeS formed will be the same as the number of moles of Fe.
To calculate the number of moles of FeS, we divide the mass of Fe by its molar mass:
moles of Fe = mass of Fe / molar mass of Fe = 7.62g / 55.85g/mol = 0.136 mol
Therefore, 0.136 moles of FeS will be formed from 7.62g of Fe.