How Many Molecules Are in a Beach Ball Using the Ideal Gas Law?

[ghostbuster25]

can anyone tell me how i should approach this problem

calculate the number of molecules of air in a beach ball of volume 6.0*10^-2m^3. The air is at temperature 35degrees, a pressure of 1.1*10^5Pa and can be trested as an ideal gas.

i just want to know what area of classical physics it is

 

[ehild]

Its is Thermodynamics, and you should apply the Ideal gas law.

ehild

 

[ghostbuster25]

thankyou, i did manage to work it out as follows

PV=NkT

k beint the Boltzmann constant
T being temperature in Kelvins and
N = number of molecules and P and V pressure and volume

rearange N=PV/kT

simples :)

 

[ehild]

Good job!