## which gas has molecules with the greatest average molecular speed at 25 C?

CH4 Kr N2 CO2 Ar 2 Answers average speed = square root of (8RT/pi M) where R = gas constant = 8.314 J/K/mole T = temperature pi = 22/7 or 3.14 M = molecular mass now since mass is in denominator ….it means molecular mass is inversely proportional to average speed ….so as mass increases … Read more