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clc
clear
//Input data
T=300;//The given temperature in K
R=8.3*10^7;//The Universal gas constant in ergs/g mol-K
M=221;//The molecular weight of mercury
//Calculations
C=((3*R*T)/(M))^(1/2);//The root mean square velocity of a molecule of mercury vapour at 300 K in cm/s
//Output
printf('The root mean square velocity of a molecule of mercury vapour at 300 K is C = %3.4g cm/s ',C)
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