The molecular mass of helium is 4 gmol the boltzmanns, Ask an Expert

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The molecular mass of helium is 4 g/mol, the Boltzmann's constant is 1.38066×10^?23J/K, the universal gas constant is 8.31451 J/K· mol, and Avogadro's number is 6.02214×10^23 1/mol. Given: 1 atm =101300 Pa.

How many atoms of helium gas are required to fill a balloon to diameter 21 cm at 53?C and 0.584 atm?

What is the average kinetic energy of each helium atom?

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