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

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance