How many moles of ferric alum $(NH_4)_2SO_4 \cdot Fe_2(SO_4)_3 \cdot 24H_2O$ can be made from a sample of $Fe$ containing $0.0056 \ g$ of it?
- A$10^{-4} \ mol$
- B$0.5 \times 10^{-4} \ mol$
- C$0.33 \times 10^{-4} \ mol$
- D$2 \times 10^{-4} \ mol$
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