The molecular mass of helium is 4g/mol, the Boltzmann's constant is 1.38066 *10-23 J/K, the universal gas constant is 8.31451 J/K * mol, and Avogadro's number is 6.02214 *10 ^23. Given 1 atm=101300 Pa. How many atoms of helium gas are required to fill a balloon to diameter 22 cm at 64 C and 0.768 atm?
What is the average KE of each helium atom? Answer in Joules
What is the rms speed of each helium atom?