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////
//Variable Declaration
DHebyAr = 4.0
MAr = 39.9 //Molecualar wt of Argon and Neon, kg/mol
MHe = 4.0
P = 101325.0 //Pressure and Temperature, Pa, K
T = 298.0
sigm = 3.6e-19 //
R = 8.314 //Molar Gas constant, mol^-1 K^-1
N_A = 6.02214129e+23 //mol^-1
//Calculations
sigHebyAr = (1./DHebyAr)*sqrt(MAr/MHe)
//Results
printf("\n Ratio of collision cross sections of Helium to Argon %4.3f",sigHebyAr)
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