Here's how to determine the number of atoms in iron(III) sulfate (Fe₂(SO₄)₃):

1. Identify the Elements:

* Iron (Fe)

* Sulfur (S)

* Oxygen (O)

2. Count the Atoms of Each Element:

* Iron (Fe): The subscript "2" outside the parentheses indicates there are 2 iron atoms.

* Sulfur (S): The subscript "3" outside the parentheses indicates there are 3 sulfur atoms.

* Oxygen (O): The subscript "4" within the parentheses indicates there are 4 oxygen atoms. Since the parentheses are multiplied by the subscript "3", there are a total of 4 * 3 = 12 oxygen atoms.

3. Total Atoms:

Add up the number of atoms of each element: 2 + 3 + 12 = 17 atoms

Therefore, there are 17 atoms in one molecule of iron(III) sulfate.