\(n_{H_2}=\dfrac{22,4}{22,4}=1\left(mol\right)\)
PTHH: 2Na + 2H2O ---> 2NaOH + H2
2<-------------------2
=> mNa = 2.23 = 46 (g); mCu = 100 - 46 = 54 (g)
\(Cu+2H_2O\rightarrow Cu\left(OH\right)_2+H_2\)
\(1:2:1:1\left(mol\right)\)
\(n_{H_2}=\dfrac{V}{22,4}=\dfrac{22,4}{22,4}=1\left(mol\right)\)
\(m_{Cu}=n.M=1.64=64\left(g\right)\)
\(m_{Na}=100-64=36\left(g\right)\)