Question

Question #9cfe8

Answer 1

`O_2` < `Ne` < `NH_3` < `He` < `H_2`

Explanation:

Absent any other reaction, molecules will diffuse generally in proportion to their mass. Lighter molecules will diffuse more quickly, heavier ones more slowly.

With this set, the order from slowest to fastest would be:

`O_2` (M.W. 32), `Ne` (M.W. 20), `NH_3` (M.W. 17), `He` (M.W. 4) and `H_2` (M.W. 2).