Methanethiol, $\mathrm{CH_3SH}$, undergoes combustion as shown. $\mathrm{CH_3SH + 3O_2 \rightarrow CO_2 + SO_2 + 2H_2O}$. A $10\,\mathrm{cm^3}$ sample of methanethiol gas was allowed to react with $60\,\mathrm{cm^3}$ of oxygen. Both gas volumes were recorded at room conditions. What is the final volume of the gas mixture after the reaction, when measured at room temperature?
- A$20\,\mathrm{cm^3}$
- B$30\,\mathrm{cm^3}$
- C$50\,\mathrm{cm^3}$
- D$70\,\mathrm{cm^3}$