Here's how to determine the chemical formula for Tin (IV) thiosulfate:

* Tin (IV): This indicates the tin ion has a +4 charge (Sn⁴⁺).

* Thiosulfate: This is a polyatomic ion with the formula S₂O₃²⁻.

To balance the charges, we need two thiosulfate ions for every one tin (IV) ion:

* Sn⁴⁺ + 2(S₂O₃²⁻) → Sn(S₂O₃)₂

Therefore, the chemical formula for Tin (IV) thiosulfate is Sn(S₂O₃)₂.