a)
\(n_{CO_2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)
PTHH: \(Na_2CO_3+H_2SO_4\rightarrow Na_2SO_4+CO_2+H_2O\)
0,4<--------0,4<------------------------0,4
=> \(\left\{{}\begin{matrix}\%m_{Na_2CO_3}=\dfrac{0,4.106}{54,1}.100\%=78,37\%\\\%m_{NaCl}=100\%-78,33\%=21,63\%\end{matrix}\right.\)
b) \(\left\{{}\begin{matrix}m_{Na_2CO_3}=0,4.106=42,4\left(g\right)\\m_{NaCl}=54,1-42,4=11,7\left(g\right)\end{matrix}\right.\)
c) \(C_{M\left(H_2SO_4\right)}=\dfrac{0,4}{0,2}=2M\)