A sample of Xe takes 75 seconds to effuse out of a container. An unknown gas takes 37 seconds to effuse out of the identical container under identical conditions. What is the most likely identity of the uknown gas

the answer is O2. How do you solve this?

1 answer

Grahams law look that up in your text.

Xe has molweight of 131

sqrt(xxx/131)=37/75

xxx molecular weight= 131 (37/75)^2

amazing, it is 32 the same as O2.