a) PTHH: \(CO+CuO\rightarrow Cu+CO_2\)
(N2 không phản ứng)
\(\Rightarrow n_{CuO}=n_{Cu}=0,125\left(mol\right)\)
\(\Rightarrow m_{CuO}=10\left(g\right)\)
b) PTHH: \(3Cu+8HNO_3\rightarrow3Cu\left(NO_3\right)_2+2NO+4H_2O\)
\(\Rightarrow2n_{Cu}=3n_{NO}\Rightarrow n_{NO}=\dfrac{1}{12}\left(mol\right)\)
\(\Rightarrow V_{NO}=\dfrac{1}{12}\cdot22,4=\dfrac{28}{15}\left(l\right)\)