*Sửa đề: Tính thể tích Oxi cần dùng
PTHH: \(4Al+3O_2\xrightarrow[]{t^o}2Al_2O_3\)
Ta có: \(n_{Al}=\dfrac{13,5}{27}=0,5\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}n_{O_2}=0,375\left(mol\right)\\n_{Al_2O_3}=0,25\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}V_{O_2}=0,375\cdot22,4=8,4\left(l\right)\\m_{Al_2O_3}=0,25\cdot102=25,5\left(g\right)\end{matrix}\right.\)