Hydrogen chloride gas, $\text{HCl}$, reacts with ammonia gas, $\text{NH}_3$, to produce solid ammonium chloride. The apparatus is arranged as shown. After a few minutes, solid ammonium chloride appears at the point where the two gases meet. The experiment is repeated with hydrogen bromide, $\text{HBr}$, used instead of hydrogen chloride. At what distance along the tube does solid ammonium bromide form?
- APosition A along the tube
- BPosition B along the tube
- CPosition C along the tube
- DPosition D along the tube