Finding Molecular Velocity

Question

A 1.25 g sample of helium gas at 25°C has a KE of 132 J. What is the average molecular velocity of the gas? Report your answer in meters per second to the nearest whole number.

Answer 1

KE=1/2 mv^2

KE=kinetic energy

m=mass (in kg)

v= velocity in m/s

132=1/2(1.25E-3)v^2

v=459m/s