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April 19, 2014

Homework Help: physics

Posted by sand on Wednesday, January 4, 2012 at 12:14am.

A portable steel tank with a volume 35 liters (0.035m) holds helium gas used for filling party balloons. The pressure in the tank is 120atm when at room temperature of 22 C. How many moles of helium gas are in the tank?
Each balloon has a volume of 2.5liters when filled with room temperature helium at a pressure of 1.2atm. How many balloons will the tank inflate?
Helium gas particles are single atoms with a mass of four atomic mass units. What is the r.m.s speed of the helium atoms at room temperature 22 C?

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