a, PT: \(Fe+2HCl\rightarrow FeCl_2+H_2\)
b, Ta có: \(n_{H_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Theo PT: \(n_{Fe}=n_{H_2}=0,2\left(mol\right)\)
\(\Rightarrow m_{Fe}=0,2.56=11,2\left(g\right)\)
\(\Rightarrow m_{Cu}=32-11,2=20,8\left(g\right)\)
b, \(\left\{{}\begin{matrix}\%m_{Fe}=\dfrac{11,2}{32}.100\%=35\%\\\%m_{Cu}=65\%\end{matrix}\right.\)
c, Theo PT: \(n_{HCl}=2n_{H_2}=0,4\left(mol\right)\)
\(\Rightarrow C_{M_{HCl}}=\dfrac{0,4}{0,2}=2\left(M\right)\)