Mg +H2SO4--->MgSO4 +H2
Ta có
n\(_{H2}=\frac{11,2}{22,4}=0,5\left(mol\right)\)
Theo pthh
n\(_{Mg}=n_{H2}=0,5\left(mol\right)\)
m\(_{Mg}=0,5.24=12\left(g\right)\)
Đề sai hay sao ý
PTHH : Mg +H2SO4 = MgSO4 + H2
nH2=0,5mol
=> nMg=0,2mol
=> nMg=0,5 mol
=> mMg=0,5.24=12g