`(NH_(4))_(2)SO_(4)FeSO_(4)6H_(2)O`, is this compound alum or not? 

Explanation

To determine whether the compound \((NH_4)_2SO_4 \cdot FeSO_4 \cdot 6H_2O\) is an alum or not, we can follow these steps:

### Step 1: Understand the Definition of Alum
Alums are a specific type of chemical compound that typically consist of a hydrated double sulfate salt of aluminum. The general formula for alums can be expressed as \(XAl(SO_4)_2 \cdot 12H_2O\), where \(X\) is a monovalent cation such as potassium (K) or sodium (Na).

### Step 2: Analyze the Given Compound
The given compound is \((NH_4)_2SO_4 \cdot FeSO_4 \cdot 6H_2O\). Here, we can identify the components:
- \((NH_4)_2SO_4\) is ammonium sulfate.
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