Which of the following statements is true for ideal gases, but is not always true for real gases?
choose all that apply.

there are no attractive forces between molecules.

pressure is caused by molecule-wall collisions.

replacing one gas by another under the same conditions, has no effect on pressure.

average molecular kinetic energy increases with temperature.

which of the following statements is true for real gases?
choose all that apply.

attractive forces between molecules cause an increase in pressure compared to the ideal gas.

as molecules increase in size, deviations from ideal behavior become more apparent at relatively low pressures.

attractive forces between molecules cause a decrease in pressure compared to the ideal gas.

as molecules increase in size, deviations from ideal behavior become more apparent at relatively high pressures.

1.) which of the following is a molecule but not a compound? a.he b.f2 c.h2o d.ch4 2.) what is a physical combination of substances? a.a compound b.a molecule c.a mixture d.an element 3.) what is a chemical combination of substances? a.a compound b.an atom c.a mixture d.an element 4.) what is the relationship between the solute and solvent in a solution? a.they form a compound b.they form a mixture c.they form molecules d.they form chemical bonds 5.) the gases in air dissolve in water. what would be one way to reduce the amount of a gas dissolved in water? a.add more water b.reduce the air pressure c.increase the air pressure d.stir the water 6.) how would you determine the solubility of a substance? a.find how well it dissolved various substances. b.find the mass and the volume of the substance. c.find the temperature at which the substance evaporated. d.find how much i was able to dissolve in a solute. 7.) the periodic table organizes all of the kinds of a.molecules. b.compounds. c.atoms. d.ions. 8.)what distinguishes two substances combined to become a compound vs. two substances combined to become a mixture? a.whether they can be easily separated b.whether they chemically bond together c.whether they both are visible d.whether they are heterogeneous 9.) the principle components of air are: n2 78% o2 21% ar 0.95% co2 0.038% this is a solution of a.molecules and atoms. b.molecules. c.compounds and molecules. d.atoms.