Question: (a) How many atoms of helium gas fill a balloon having a diameter of 30.0 cm at 20.0C and 1.00 atm? (b) What is the

(a) How many atoms of helium gas fill a balloon having a diameter of 30.0 cm at 20.0°C and 1.00 atm?
(b) What is the average kinetic energy of the helium atoms?
(c) What is the root-mean-square speed of the helium atoms?

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