Khối lượng nhôm oxit là: \(1,02\cdot80\%=0,816\left(\text{tấn}\right)=816000\left(g\right)\)
\(2Al_2O_3\xrightarrow[.]{t^0}4Al+3O_2\)
\(n_{Al_2O_3}=\frac{816000}{102}=8000\left(mol\right)\)
Theo pt: \(n_{Al}=2n_{Al_2O_3}=16000\left(mol\right)\)
\(n_{Al\left(tt\right)}=16000\cdot75\%=12000\left(mol\right)\)
Ta có: \(m_{Al\left(tt\right)}=12000\cdot27=324000\left(g\right)=0,324\left(\text{tấn}\right)\)
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