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//Chapter 2: Spectroscopy and Photochemistry
//Problem: 7
clc;
//Declaration of Constants
pi = 3.141 // pi
c = 3 * 10 ** 10 // speed of light, cm /s
h = 6.626 * 10 ** -34 // Plank's constant, J.sec
Na = 6.022 * 10 ** 23 // Mole constant, /mol
//Declaration of Variables
d = 20.7 // Interspacing, /cm
m1 = 1 // Mass of H, g / mol
m2 = 35.5 // Masso f Cl, g / mol
// Solution
B = 0.1035 * 10 ** 2 // /m
I = h / (8 * pi ** 2 * B * c)
mu = m1 * m2 / ((m1 + m2) * Na)
mu = mu * 10 ** -3
r = sqrt(I / mu)
mprintf("The intermolecular distance of HCl is %.3e m",r)
// The answer provided in the textbook is wrong
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