Question

Which gas has the highest average molecular speed?

Answer 1

Answer:

"Methane"

• The average gas velocity is inversely proportional to the molar mass M. This means that the lower the M, the higher the average gas velocity. Methane (CH4) ( C H 4 ) has the lowest molar mass (16.04 g/mol) of the 5 gases. Therefore, methane has the highest average molecular speed.

Answer 2

Answer:

Helium

Explanation:

Note that gas with highest molar mass has lowest molecular speeds and gas with lowest molar mass has highest molecular speed.