a, \(n_{H_2}=0,25\left(mol\right)\)
Bảo toàn e:
\(2n_{Zn}=2n_{H_2}\Rightarrow n_{Zn}=0,25\left(mol\right)\)
\(\Rightarrow m_{Zn}=16,25\left(g\right)\)
\(\Rightarrow m_{Cu}=13,75\left(g\right)\)
b, \(\%m_{Cu}=\dfrac{13,75}{30}=45,83\%\)
\(\Rightarrow\%m_{Zn}=100\%-45,83\%=54,17\%\)
c, Bảo toàn nguyên tố H:
\(n_{HCl}=2n_{H_2}=0,5\left(mol\right)\)
\(\Rightarrow C\%_{HCl}=\dfrac{0,5.36,5}{200}=9,125\%\)