Unbalanced Equation:

Ag + H₂S → Ag₂S + H₂

Balanced Equation:

2Ag + H₂S → Ag₂S + H₂

Explanation:

1. Identify the elements: The elements present are silver (Ag), hydrogen (H), and sulfur (S).

2. Count the atoms on each side:

* Reactants: 1 Ag, 2 H, 1 S

* Products: 2 Ag, 2 H, 1 S

3. Balance silver (Ag): There's 1 Ag on the reactant side and 2 on the product side. Add a coefficient of 2 in front of Ag on the reactant side.

4. Check for balance: Now, the equation is balanced.

The balanced chemical equation is 2Ag + H₂S → Ag₂S + H₂.