\(a,n_{H_2}=\dfrac{12,395}{24,79}=0,5mol\\ n_{Al}=a;n_{Fe}=b\\ 2Al+6HCl\rightarrow2AlCl_3+3H_2\\ a......3a.......a........1,5a\\ Mg+2HCl\rightarrow MgCl_2+H_2\\ b......2b.......b.........b\\ \Rightarrow\left\{{}\begin{matrix}27a+24b=10,2\\1,5a+b=0,5\end{matrix}\right.\\ \Rightarrow a=b=0,2mol\\ \%m_{Al}=\dfrac{0,2.27}{10.2}\cdot100\%=52,94\%\\ \%m_{Mg}=100\%-52,94\%=47,06\%\\ b,m_{muối}=0,2.\left(133,5+95\right)=45,7g\\ c,500ml=0,5l\\ C_{M_{HCl}}=\dfrac{0,2.3+0,2.2}{0,5}=2M\)