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+clc

+clear 

+//Input data 

+p=760;//The given pressure in mm of Hg 

+T=273;//The temperature of the chamber in K 

+V=22400;//The volume of the gas at N.T.P in cc 

+p1=10^-6;//The pressure in the chamber in mm of mercury pressure 

+N=6.023*10^23;//The Avogadro number 

+d=2*10^-8;//Molecular diameter in cm 

+pi=3.14;//Mathematical constant of pi 

+

+//Calculations 

+n=(N*p1)/(V*p);//The number of molecules per cm^3 in the chamber in molecules/cm^3 

+L=1/(pi*(d)^2*n);//The mean free path of the gas molecules in the chamber in cm 

+

+//Output 

+printf('The mean free path of gas molecules in a chamber is %3.4g cm ',L)