A gas cylinder is positioned in each corner of a square-shaped room. Each cylinder holds a different gas at the same pressure. The gases are let out at the same instant. Which gas will arrive at the centre of the room first?
- Aammonia, $\text{NH}_3$
- Bargon, $\text{Ar}$
- Ccarbon monoxide, $\text{CO}$
- Dchlorine, $\text{Cl}_2$