\(X+\dfrac{1}{2}O_2-^{t^o}\rightarrow XO\)
\(n_X=2n_{O_2}=0,8\left(mol\right)\)
=> \(M_X=\dfrac{19,2}{0,8}=24\left(Mg\right)\)
PTHH: \(2X+O_2\xrightarrow[]{t^o}2XO\)
Ta có: \(n_{O_2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)
\(\Rightarrow n_X=0,8\left(mol\right)\) \(\Rightarrow M_X=\dfrac{19,2}{0,8}=24\) (Magie)