A) Assume that a substance in a closed container is at thermal equilibrium with about half of its molecules in the gas phase and half of its molecules in the liquid phase. How could you use the Particle Model of Thermal Energy to explain which molecules are moving faster, on average-those in the gas phase, those in the liquid phase, or neither? b) Now assume that liquid water (H20) and gaseous oxygen (O2) are at thermal equilibrium in a closed container at room temperature. How would your explanation for which molecules are moving faster (the H2O molecules in the liquid phase, the O2 molecules in the gas phase, or neither) be the same as your explanation in part a), and how would it differ?

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

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

explanation: no but i do not usually comment

i do not get it   at all