a)\(PTHH:CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
b)\(n_{CuO}=\dfrac{4}{80}=0,05\left(m\right)\)
\(PTHH:CuO+H_2\underrightarrow{t^o}Cu+H_2O\)
tỉ lệ :1 1 1 1
số mol :0,05 0,05 0,05 0,05
\(m_{Cu}=0,05.64=3,2\left(g\right)\)
c)\(V_{H_2}=0,05.22,4=1,12\left(l\right)\)