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?

Answer 1

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.

Answer 2

THANKS!JUST HAD TO FIND THE R CONSTANT VALUE: 8.3145J/MOL