Câu 1:
\(CuO+H_2\underrightarrow{^{to}}Cu+H_2O\)
\(n_{CuO}=\frac{10}{80}=0,125\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}n_{Cu}=0,125\left(mol\right)\\n_{H2}=0,125\left(mol\right)\end{matrix}\right.\)
a, \(m_{Cu}=0,125.64=8\left(g\right)\)
b, \(V_{H2}=0,125.22,4=2,8\left(l\right)\)
Câu 2:Tương tự nha