Density describes how much mass is contained in a certain volume. knowing how far apart molecules are in each state, which best ranks solids, liquids, and gasses from least dense to most dense?

The order will be: gases < liquids < solids

Explanation:

Density is defined as measure of mass of substance present in unit volume of the substance.It is measured in gram per centimeter cube .

In solid state, molecules are strongly associated with each other that is they are tightly packed. Due to this tight packing, more mass will be present in a unit volume.

In liquid state, molecules are weakly associated with each other. Due to this weak association, the mass present in a unit volume will be less than that of the solid state.

In gaseous state, molecules are very far apart from each other. Due to this very weak association, the mass present in a unit volume will be less than that of the solid and the liquid state

So,the order from least dense to most dense will be:

Gases < liquids < solids

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

it means there are 3 atoms of oxygen