a)
Na2O + H2SO4 --> Na2SO4 + H2O
BaO + H2SO4 --> BaSO4 + H2O
b)
Gọi số mol Na2O , BaO là a, b (mol)
=> 62a + 153b = 40,1 (1)
\(n_{H_2SO_4}=1.0,5=0,5\left(mol\right)\)
Theo PTHH: \(n_{H_2SO_4}=a+b=0,5\left(2\right)\)
(1)(2) => a = 0,4 (mol); b = 0,1 (mol)
\(\left\{{}\begin{matrix}m_{Na_2O}=0,4.62=24,8\left(g\right)\\m_{BaO}=0,1.153=15,3\left(g\right)\end{matrix}\right.\)
c) \(\left\{{}\begin{matrix}\%m_{Na_2O}=\dfrac{24,8}{40,1}.100\%=61,85\%\\\%m_{BaO}=\dfrac{15,3}{40,1}.100\%=38,15\%\end{matrix}\right.\)