Question

what is the total number of moles of sulfur atoms in 1 mole of Fe2(SO4)3

Answer 1

since you have 3 atoms of sulfur in that molecule in on mole of it you would have 3 moles of sulfur

Answer 2

Answer: There are 3 moles of sulfur atoms present in 1 mole of $Fe_2(SO_4)_3$

Explanation:

In the given compound $Fe_2(SO_4)_3$, there are 3 elements present: iron, sulfur and oxygen.

There are 2 moles of iron element, 3 moles of sulfur element and 12 moles of oxygen element present in 1 mole of $Fe_2(SO_4)_3$

Hence, there are 3 moles of sulfur atoms present in 1 mole of $Fe_2(SO_4)_3$