Given`^^^""^(@)=((1)/(3)Al^(3+))=63 cm^(2)//Omega` mol and `^^^ ""^(@)((1)/(2)SO_(4)^(2-))=80 cm^(2)//Omega mol`.
The value of `^^^ ""^(@) Al_(2)(SO_(4))_(3)` would be

Options

A. `143 cm^(2)//Omega` mol
B. `206 cm^(2)//Omega` mol
C. `286 cm^(2)//Omega` mol
D. `858 cm^(2)//Omega` mol

Answer

D