Here's why:
* Graham's Law of Diffusion: This law states that the rate of diffusion of a gas is inversely proportional to the square root of its molar mass.
* Molar Mass: The molar mass of HCl (36.46 g/mol) is lower than the molar mass of ammonia (17.03 g/mol).
* Diffusion Rate: Since HCl has a lower molar mass, it will diffuse faster than ammonia.
In simpler terms: Lighter molecules move faster and spread out more quickly than heavier molecules.
