The formula Fe₂(SO₄)₃ is incorrect. It should be Fe₂(SO₄)₃, which represents ferric sulfate.

Here's how to break down the formula to count the atoms:

* Fe₂: This indicates two iron (Fe) atoms.

* (SO₄)₃: This indicates three sulfate (SO₄) groups. Each sulfate group contains:

* One sulfur (S) atom

* Four oxygen (O) atoms

Therefore, in one molecule of Fe₂(SO₄)₃, there are:

* 2 Iron (Fe) atoms

* 3 Sulfur (S) atoms

* 12 Oxygen (O) atoms

Total: 17 atoms