The chemical formula for chromic sulfite is Cr₂(SO₃)₃. Here's how to figure that out:

* Chromic indicates the chromium ion with a +3 charge (Cr³⁺).

* Sulfite refers to the sulfite ion with a -2 charge (SO₃²⁻).

To balance the charges, you need two chromium ions (2 x +3 = +6) and three sulfite ions (3 x -2 = -6). This gives you the formula Cr₂(SO₃)₃.