A compound has the formula $$ \text{Al}_2(\text{SO}_4)_3 $$ ...

Question Analysis
This question evaluates the student's ability to calculate the percent composition of an element in a compound with a polyatomic ion.

Key Concept Explanation
The percent composition of an element in a compound is found by dividing the total mass of that element in one mole of the compound by the molar mass of the compound, then multiplying by 100%.

Step-by-step Solution
1. Determine the molar mass of the compound

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