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Theo đề bài, ta có: \(\left\{{}\begin{matrix}m_{Mg}=18.36\%=6,48\left(g\right)\\m_{Al}=18-6,48=11,52\left(g\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}n_{Mg}=\dfrac{6,48}{24}=0,27\left(mol\right)\\n_{Al}=\dfrac{11,52}{27}=\dfrac{32}{75}\left(mol\right)\end{matrix}\right.\)
PTHH: \(2Mg+O_2\underrightarrow{o}2MgO\)
pư........0,27.......0,135...0,27 (mol)
PTHH: \(4Al+3O_2\underrightarrow{o}2Al_2O_3\)
pư.........\(\dfrac{32}{75}\)......\(0,32\).....\(\dfrac{16}{75}\) (mol)
1) \(\left\{{}\begin{matrix}m_{MgO}=0,27.\left(24+16\right)=10,8\left(g\right)\\m_{Al2O3}=\dfrac{16}{75}.\left(2.27+3.16\right)=21,76\left(g\right)\end{matrix}\right.\)
2) Theo mình là Tính \(V_{O2}\)
\(\Rightarrow V_{O2}=22,4.\left(0,135+0,32\right)=10,192\left(l\right)\left(đktc\right)\)
Vậy............