nHCl=19,04/22,4=0,85(mol)
Mg+2HCl--->MgCl2+H2
x_____2x_____x_____x
2Al+6HCl--->2AlCl3+3H2
y____3y_____y_______3/2y
Zn+2HCl--->ZnCl2+H2
1/2y__1/4y___1/2y___1/2y
Hệ pt:
\(\left\{{}\begin{matrix}24x+92y=35\\x+2y=0,85\end{matrix}\right.\)
=>x,y
=>mAl,Fe,Mg