\(n_{H_2}=\frac{8,512}{22,4}=0,38\left(mol\right)\)
PTHH: Zn + 2HCl --> ZnCl2 + H2
a <------------------------- a (mol)
2Al + 6HCl ---> 2AlCl3 + 3H2
\(\frac{2}{3}b\) <------------------------------ b (mol)
=> \(\left\{{}\begin{matrix}65a+18b=16,24\\a+b=0,38\end{matrix}\right.\)
=> \(\left\{{}\begin{matrix}a=0,2\left(mol\right)\\b=0,18\left(mol\right)\end{matrix}\right.\)
=> mZn = 0,2.65=13(g)
=> mAl = 0,18 . \(\frac{2}{3}\) . 27 = 3,24(g)