On the surface of the catalytic converter in a car exhaust system, $7.5\,\text{g}$ of nitrogen monoxide reacts with $7.0\,\text{g}$ of carbon monoxide. What total volume do the product gases occupy at room conditions?
- A$3.0\,\text{dm}^3$
- B$6.0\,\text{dm}^3$
- C$9.0\,\text{dm}^3$
- D$12.0\,\text{dm}^3$