\(CT:X_2\left(SO_4\right)_3\)
\(\%S=\dfrac{32\cdot3}{2X+96\cdot3}\cdot100\%=24\%\)
\(\Rightarrow X=56\)
\(CT:Fe_2\left(SO_4\right)_3\)
\(M_{Fe_2\left(SO_4\right)_3}=56\cdot2+96\cdot3=400\left(đvc\right)\)
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