Ta có:
\n\n\\(n_{O2}=\\frac{1,344}{22,4}=0,06\\left(mol\\right)\\)
\n\n\\(3Fe+2O_2\\rightarrow Fe_3O_4\\)
\n\nx_____2/3x_____1/3x
\n\n\\(2Mg+O_2\\rightarrow2MgO\\)
\n\ny_____1/2y____y
\n\n\\(\\left\\{{}\\begin{matrix}56x+27y=0,96\\\\\\frac{2}{3}x+\\frac{1}{2}y=0,05\\end{matrix}\\right.\\underrightarrow{X}\\) Hệ âm
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