The correct formula of silver sulfate is:

The correct formula for silver sulfate is \( \text{Ag}_2\text{SO}_4 \).

### Explanation:

1. **Identify the ions involved**:
- Silver (Ag) is a metal that forms a cation with a charge of \( +1 \) (Ag\(^+\)).
- Sulfate (SO\(_4\)) is a polyatomic ion with a charge of \( -2 \).

2. **Balancing the charges**:
To determine the formula, we need to balance the charges of the silver cations and the sulfate anion.
- Since the sulfate ion has a charge of \( -2 \), we need two silver ions (each with a charge of \( +1 \)) to balance the \( -2 \) charge from the sulfate ion.

3. **Combining the ions**:
- We combine 2 silver ions with 1 sulfate ion to create a neutral compound.
- Thus, the formula is written as \( \text{Ag}_2\text{SO}_4 \).

### Conclusion:
Therefore, the correct chemical formula for silver sulfate is \( \text{Ag}_2\text{SO}_4 \).