The chemical formula for iron(III) carbonate is Fe₂(CO₃)₃. Here's how we arrive at that:

* Iron(III): This tells us the iron ion has a +3 charge (Fe³⁺).

* Carbonate: The carbonate ion has a -2 charge (CO₃²⁻).

To balance the charges, we need two iron(III) ions (2 x +3 = +6) and three carbonate ions (3 x -2 = -6). This gives us the formula Fe₂(CO₃)₃.