4fe + 3 o2 2 fe2 o3 in this chemical equation, why is the number of atoms the same on each side of the arrow? a. matter cannot be created or destroyed. b. chemical reactions produce new matter. c. chemical reactions reduce matter but create energy.

the answers are

c and c

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.