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clear
//
//
//
//Variable declaration
e=1.6*10**-19 //charge(coulomb)
epsilon0=8.85*10**-12
r0=0.281*10**-9 //equilibrium distance(m)
I=5.14 //ionisation energy(eV)
EA=-3.61 //electron affinity(eV)
//Calculation
V=-(e**2)/(4*e*%pi*epsilon0*r0) //potential(eV)
CE=I+EA+V //cohesive energy of molecule(eV)
//Result
printf("\n cohesive energy of molecule is %0.2f eV",CE)
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