A volume of $3.0\,\text{dm}^3$ of sulfur dioxide is reacted with $2.0\,\text{dm}^3$ of oxygen. $2\text{SO}_2(g) + \text{O}_2(g) \rightarrow 2\text{SO}_3(g)$ If the reaction is allowed to go to completion and every gas is at room temperature and pressure, what volume of sulfur trioxide is produced?
- A$2.0\,\text{dm}^3$
- B$3.0\,\text{dm}^3$
- C$4.0\,\text{dm}^3$
- D$5.0\,\text{dm}^3$