Are these right?

which of the following factors does not affect the behavior of a gas in a closed container?

the number of particles
the average kinetic energy*
the cohesive forces within the gas
the size of the container

which is not a possible sign of a physical change?

change in appearance
change in volume
the release of energy*
change in color

which of the following types of substances would be least likely to dissolve in water?

nonpolar molecule like cholesterol*
polar molecule like ethyl alcohol
ionic compound, such as magnesium chloride
polar mole like the