The average atomic mass of oxygen is 15. 9994 amu. The atomic masses of its three isotopes are as follows: O-16: 15. 995 amu; O-17: 16. 999 amu; O-18: 17. 999 amu Which isotope is most likely to have the greatest abundance in nature? A. O-16 B. O-17 C. O-18 D. All three isotopes may be equally abundant.

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answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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intermolecular forces are the forces between molecules or particles.

there are two kinds of van der waals forces: weak london dispersion forces and stronger dipole-dipole forces.

in molecule of water there are dipole-dipole forces between negatively charged oxygen from one molecule of water and positively charger hydrogen of another molecule of water.

hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (h), covalently bound to a highly electronegative atom such as flourine (f), oxygen (o) and nitrogen (n) atoms.