a: \(n_{Zn}=\dfrac{2.6}{65}=0.04\left(mol\right)\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)
0,04 0,04
\(m_{ZnCl_2}=0.04\left(65+35.5\cdot2\right)=5.44\left(g\right)\)
b: \(n_{HCl}=2\cdot0.04=0.08\left(mol\right)\)
\(m_{ct\left(HCl\right)}=0.08\cdot36.5=2.92\left(g\right)\)
\(C\%\left(HCl\right)=\dfrac{2.92}{200}=0.0146\)
d: \(n_{H_2}=n_{Zn}=0.04\left(mol\right)\)
V=0,04*22,4=0,896(lít)
\(a)n_{Zn}=\dfrac{2,6}{65}=0,04mol\\ Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow\)
0,04 0,08 0,04 0,04
\(m_{ZnCl_2}=0,04.136=5,44g\\ b)C_{\%HCl}=\dfrac{0,08.36,5}{200}\cdot100=1,46\%\\ c)C_{M\left(HCl\right)}=\dfrac{0,08}{0,2}=0,4M\\ d)V_{H_2}=0,04.22,4=0,896l\\ e)H_2+CuO\underrightarrow{t^0}Cu+H_2O\\ n_{Cu}=n_{H_2}=0,04mol\\ m_{Cu}=0,04.64=2,56g\)