Chất rắn C là Cu \(\Rightarrow\%_{Cu}=65,31\%\)
Gọi \(\left\{{}\begin{matrix}n_{Mg}:a\left(mol\right)\\n_{Al}:b\left(mol\right)\end{matrix}\right.\)
\(Mg+2HCl\rightarrow MgCl_2+H_2\)
a______2a______a________a
\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
b_______3b_____b______1,5b
Giải hệ PT:
\(\left\{{}\begin{matrix}24a+27b+19,2=29,4\\a+1,5b=0,5\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}a=0,2\\b=0,2\end{matrix}\right.\)
\(\Rightarrow m_{Mg}=0,2.24=4,8\left(g\right)\)
\(\Rightarrow m_{Al}=0,2.27=5,4\left(g\right)\)