A compound has the formula $$ \text{FeSO}_4 \cdot 7\text{H}_...

Question Analysis
This question assesses the student's ability to calculate the percent composition of an element in a hydrate, which involves considering the water molecules in the compound.

Key Concept Explanation
Percent composition is calculated by dividing the total mass of a specific 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 :
Molar mass of Fe = 55.8 g/mol
Molar mass of S = 32.1 g/mol
Molar mass of O = 16.0 g/mol
Molar mass of H = 1.0 g/mol
Molar mass of

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