The apparatus is arranged as shown. After a few minutes, a white ring of ammonium chloride forms in the position shown. Which statement accounts for the observation after several minutes?
- AAmmonia gas diffuses faster than hydrogen chloride gas because its molecules have a lower molecular mass.
- BAmmonia gas diffuses faster than hydrogen chloride gas because its molecules have a higher molecular mass.
- CAmmonia gas diffuses slower than hydrogen chloride gas because its molecules have a lower molecular mass.
- DAmmonia gas diffuses slower than hydrogen chloride gas because its molecules have a higher molecular mass.