The correct formula for manganese III chlorate is Mn(ClO3)3.
To explain this, we need to break down the components of the compound:
- Manganese (Mn): In this compound, manganese has a +3 oxidation state, which is indicated by the Roman numeral III.
- Chlorate (ClO3): The chlorate ion has a -1 charge. Therefore, to balance the +3 charge from manganese, we need three chlorate ions.
When combining these, we get manganese with three chlorate ions, resulting in the formula Mn(ClO3)3.