If i have 15.7g of sulfur, how do i work out how much iron is needed to make iron sulfide

Mass = 27.4 g

Explanation:

Given dа ta:

Mass of sulfur = 15.7 g

Mass of iron = ?

Solution:

Chemical equation:

Fe + S → FeS

Number of moles of sulfur:

Number of moles = 15.7 g/32 g/mol

Number of moles = 0.49 mol

Now we will compare the moles of sulfur with iron

S : Fe

1 : 1

0.49 : 0.49

Mass of iron:

Mass = number of moles * molar mass

Mass = 0.49 mol * 55.85 g/mol

Mass = 27.4 g