Calculate the coulombic force of repulsion between nearest-neighbor o2- ions in cao. (note problems 2.15, 2.16, and 2.17.)

F = -1.604x10⁻⁸ N

Explanation:

The Coulomb force (F) of repulsion between nearest-neighbor O²⁻ ions in CaO can be calculated using the next equation:    

where K: is the coulomb's constant, Z: is the charge of the Ca²⁺ and O²⁻ ions, e⁻: is the electron's charge, and r: is the distance between the nuclei of the two ions.  

Having that:

The Coulomb force (F) of repulsion is:

Hence, the Coulomb force of repulsion between the two ions in CaO is -1.604x10⁻⁸ N.

I hope it helps you!

the answer to this question is 3.