Final answer:
The correct name for Al2(SO4)3 is aluminum sulfate, as it is a simple ionic compound and does not require the use of prefixes to denote the number of atoms. Therefore, the correct option is C.
Step-by-step explanation:
The correct name for the compound Al2(SO4)3 is aluminum sulfate. This name does not require the use of prefixes such as di-, tri-, etc., because the formula is derived from the ionic charges of the aluminum ion (Al3+) and the sulfate ion (SO42-). The compound consists of two aluminum ions for every three sulfate ions, which is reflected in the subscript numbers in the formula Al2(SO4)3. In naming simple ionic compounds like this, prefixes are typically not used; instead, the stoichiometry is understood from the charges on the ions involved.