The formula for uranium(V) sulfide is U₂S₅. Here's how we arrive at this:

* Uranium(V): This indicates that uranium has a +5 oxidation state (U⁵⁺).

* Sulfide: This refers to the sulfur anion, which has a -2 oxidation state (S²⁻).

To balance the charges, we need two uranium ions (2 x +5 = +10) and five sulfide ions (5 x -2 = -10). This gives us the formula U₂S₅.