a)\(Zn+H2SO4-->ZnSO4+H2\)
b)\(n_{Zn}=\frac{13}{65}=0,2\left(mol\right)\)
\(n_{H2}=n_{Zn}=0,2\left(mol\right)\)
\(V_{H2}=0,2.22,4=4,48\left(l\right)\)
c)\(Al2O3+3H2--->2Al+3H2O\)
\(n_{Al2O3}=\frac{10,2}{102}=0,1\left(mol\right)\)
Lập tỉ lệ
\(n_{Al2O3}\left(\frac{0,1}{1}\right)>n_{H2}\left(\frac{0,2}{3}\right)=>Al2O3dư\)
\(n_{Al}=\frac{2}{3}n_{H2}=\frac{2}{15}\left(mol\right)\)
\(m_{Al}=\frac{2}{15}.27=\frac{18}{5}\left(g\right)\)