In a closed container, $10\,\text{cm}^3$ of propane is burned with $70\,\text{cm}^3$ of oxygen. $\text{C}_3\text{H}_8(g) + 5\text{O}_2(g) \rightarrow 3\text{CO}_2(g) + 4\text{H}_2\text{O}(l)$. What total volume of gas is present after the reaction? (Assume all gas volumes are measured at room temperature and pressure.)
- A$30\,\text{cm}^3$
- B$50\,\text{cm}^3$
- C$70\,\text{cm}^3$
- D$90\,\text{cm}^3$