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+
+clc
+//initialization of variables
+m = 20/(6*10^23)//wt of each molecule
+kb = 1.38*10^-16 // g-cm^2/sec-K
+T = 298 // Kelvin
+dou = 0.04*10^-7 // cm
+//Calculations
+v = sqrt(kb*T*2/m) //cm/sec
+D = (dou*v/6)*10^5 // in x*10^-5 cm^2/sec
+//Results
+printf("The value of Diffusion co efficient is %.f x10^-5 cm^2/sec",D)