The average molecular speed is gretest in which of the following gas samples?

Options

A. `1.0 mol N_(2)` at `560 K`
B. `0.50 mol` of `Ne` at `500 K`
C. `0.20 mol` of `CO_(2)` at `440 K`
D. `2.0 mol` of `Ke` at `140 K`

Explanation

`overline(u)=sqrt((8RT)/(pi M))`
`overline(u) prop sqrt((T)/(M))`
(`a`) `overline(u) prop sqrt((560)/(28))=sqrt(20)`
(`b`) `overline(u) prop sqrt((500)/(20))=sqrt(25)`
(`c`) `overline(u) prop sqrt((440)/(44))=sqrt(11)`
(`d`) `overline(u) prop sqrt((140)/(4))=sqrt(35)`