PTHH: \(Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)
\(CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
Ta có: \(n_{Zn}=\dfrac{26}{65}=0,4\left(mol\right)=n_{H_2}=n_{CuO}\)
\(\Rightarrow\left\{{}\begin{matrix}m_{CuO}=0,4\cdot80=32\left(g\right)\\V_{H_2}=0,4\cdot22,4=8,96\left(l\right)\end{matrix}\right.\)
\(Zn + 2HCl \to ZnCl_2 + H_2\\ n_{H_2} = n_{Zn} = \dfrac{26}{65} = 0,4(mol)\\ \Rightarrow V_{H_2} = 0,4.22,4 = 8,96\ lít\\ CuO + H_2 \xrightarrow{t^o} Cu + H_2O\\ n_{CuO} = n_{H_2} = 0,4(mol)\\ \Rightarrow m_{CuO} = 0,4.80 = 32\ gam\)