\(n_{H_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\\ a,Zn+2HCl\rightarrow ZnCl_2+H_2\\ 0,15.......0,3.........0,15........0,15\left(mol\right)\)
Còn Cu thì không phản ứng với dung dịch HCl.
\(b,\%m_{Zn}=\dfrac{0,15.65}{23}.100\approx42,391\%\\ \Rightarrow\%m_{Cu}\approx57,609\%\\ c,C\%_{ddHCl}=\dfrac{0,3.36,5}{200}.100=5,475\%\\ d,C\%_{ddZnCl_2}=\dfrac{136.0,15}{0,15.65+200-0,15.2}.100\approx9,74\%\)