\(m_{CuO}=\dfrac{23,3.34,3}{100}=7,8\left(g\right)\)
\(\rightarrow m_{Al_2O_3}=23,3-7,8=15,5\left(g\right)\)
\(n_{CuO}=\dfrac{7,8}{80}=0,0975\left(mol\right)\)
\(CuO+H_2\rightarrow\left(t^o\right)Cu+H_2O\)
0,0975 0,0975 ( mol )
\(m_{Cu}=0,0975.64=6,24\left(g\right)\)
\(m_{kl}=m_{Cu}+m_{Al_2O_3}=6,24+15,5=21,74\left(g\right)\)