\(n_{H_2}=\dfrac{5.6}{22.4}=0.25\left(mol\right)\)
\(n_{CuO}=\dfrac{7.2}{80}=0.09\left(mol\right)\)
\(CuO+H_2\underrightarrow{^{^{t^0}}}Cu+H_2O\)
Lập tỉ lệ :
\(\dfrac{0.25}{1}>\dfrac{0.09}{1}\rightarrow H_2dư\)
\(n_{Cu}=n_{CuO}=0.09\left(mol\right)\)
\(m=0.09\cdot64=5.76\left(g\right)\)
\(n_{H_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\\ n_{CuO}=\dfrac{7,2}{80}=0,09\left(mol\right)\\ PTHH:CuO+H_2\underrightarrow{to}Cu+H_2O\\ Vì:\dfrac{0,25}{1}>\dfrac{0,09}{1}\\ \rightarrow H_2dư\\ \rightarrow n_{Cu}=n_{CuO}=0,09\left(mol\right)\\ m_{Cu}=0,09.64=5,76\left(g\right)\)