Question

a. What are the molar masses of helium, air and sulfur hexafluoride? b. Given constant external temperature, which gas would travel the fastest? Slowest? c. Which average molar mass is higher, normal air or oxygen-enriched air?

Answer 1

C) In part A) while calculating molar mass of air we noticed that oxygen is having more molar mass than nitrogen and as concentration of oxygen will be increased there will be a relation increase in average molar mass of air. So oxygen enriched air will have higher average molar mass than normal air.