Ta có: \(n_{CuO}=\dfrac{48}{80}=0,6\left(mol\right)\)
PTHH: \(CuO+CO\xrightarrow[]{t^o}Cu+CO_2\)
BĐ: 0,6 (mol)
Pứ: a_____a_____a____a
Dư: (0,6-a)_________a____a (mol)
Ta có: \(80\cdot\left(0,6-a\right)+64a=43,2\) \(\Rightarrow a=0,3\)
\(\Rightarrow\left\{{}\begin{matrix}\%m_{CuO\left(p.ứ\right)}=\dfrac{0,3}{0,6}\cdot100\%=50\%\\m_{Cu}=0,3\cdot64=19,2\left(g\right)\end{matrix}\right.\)