Mg+2HCl->MgCl2+H2
0,25--------------------0,25 mol
3H2+Fe2O3-to>2Fe+3H2O
0,25-----1\12-------------1\6 mol
n Mg=6\24=0,25 mol
=>m Fe=1\6 .56=9,33g
=>m Fe2O3=1\12.160=13.33g
\(n_{Mg}=\dfrac{6}{24}=0,25\left(mol\right)\)
PTHH: Mg + 2HCl → MgCl2 + H2
Mol: 0,25 0,25
PTHH: Fe2O3 + 3H2 → 2Fe + 3H2O
Mol: 1/12 0,25
\(m_{Fe_2O_3}=\dfrac{1}{12}.160=13,33\left(g\right)\)