\(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\\ n_{Zn}=n_{H_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\\ \%m_{Zn}=\dfrac{0,1.65}{10}.100=65\%\\ \Rightarrow\%m_{Cu}=100\%-65\%=35\%\)
Zn+H2SO4→ZnSO4+H2nZn=nH2=2,2422,4=0,1(mol)%mZn=0,1.6510.100=65%⇒%mCu=100%−65%=35%