Gọi số mol H2S, CO2 là a, b (mol)
\(\overline{M}=\dfrac{34a+44b}{a+b}=19,5.2=39\left(g/mol\right)\)
=> 5a = 5b
=> a = b
=> \(\left\{{}\begin{matrix}\%m_{H_2S}=\dfrac{34a}{34a+44b}.100\%=43,59\%\\\%m_{CO_2}=\dfrac{44b}{34a+44b}.100\%=56,41\%\end{matrix}\right.\)