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// Ex9_1 Page:172 (2014)
clc;clear;
d = 3.8626; // The average spacing between adjacent rotational lines of CO molecule, per cm
B = d/2*100; // Rotational constant, per m
h = 6.626e-034; // Planck's constant, Js
c = 3e+08; // Speed of light in vacuum, m/s
I = h/(8*%pi^2*B*c); // Moment of inertia of the CO molecule, kg/Sq.m
N_A = 6.022e+023; // Avogadro's number, atoms/mol
M_C = 0.012; // Isotopic masses of C-12 atom, kg/mol
M_O = 0.016; // Isotopic masses of Om-16 atom, kg/mol
mu = M_C*M_O/((M_C + M_O)*N_A); // Reduced mass of CO molecule, kg
r = sqrt(I/mu); // Bond length of CO, m
printf("\nThe bond length of CO = %5.3e m", r);
// Result
// The bond length of CO = 1.128e-010 m
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