Asked by Celi
                physics 2B---- A toy balloon is filled with helium gas ( He}) at 1atm} and 30 degrees Celcius.  If the volume of the balloon is 0.025 m^3, how many atoms does it contain?
            
            
        Answers
                    Answered by
            Melissa
            
    This ties in with chemistry actually. They give you Temperature, Pressure, and Volume. Convert temperature to Kelvins (add 273) and convert your volume to Liters. Use R constant 0.0821. Plug into the ideal gas law of PV=nRT and solve for the moles of the He atom (thats n). Once you have moles, its a simple conversion, 1 mole= atoms of 6.022x10^23. So it'd be your molesx 6.022x10^23 atoms/1 mole. 
    
                    Answered by
            Celi
            
    THANKS!JUST HAD TO FIND THE R CONSTANT VALUE: 8.3145J/MOL
    
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