\(n_{Al}=\dfrac{5.4}{27}=0.2\left(mol\right)\)
\(4Al+3O_2\underrightarrow{^{^{t^0}}}2Al_2O_3\)
Ta có :
\(n_{Al_2O_3}=\dfrac{0.2\cdot2}{4}=0.1\left(mol\right)\)
\(m_{Al_2O_3}=0.1\cdot102=10.2\left(g\right)\)
\(n_{Fe}=\dfrac{11.2}{56}=0.2\left(mol\right)\)
\(3Fe+2O_2\underrightarrow{^{^{t^0}}}Fe_3O_4\)
\(0.2.......\dfrac{2}{15}.....\dfrac{1}{15}\)
\(V_{O_2}=\dfrac{2}{15}\cdot22.4=2.98\left(l\right)\)
\(m_{Fe_3O_4}=\dfrac{1}{15}\cdot232=15.46\left(g\right)\)