Ascottish chemist thomas graham observed and experimented with gas particles in the 1800's. he formulated a mathematical equation that describes the relationship between the mass of a gas molecule and its rate of effusion. this relationship is a a. law because it describes what happens without explaining why. b. law because it is based on mathematics. c. theory because it describes a relationship. d. theory because it is a description without an explanation.

Which statement is true according to the kinetic theory? a. molecules of different gases with the same mass and temperature always have the same average density. b. molecules of different gases with the same mass and temperature always have the same average volume. c. molecules of different gases with the same mass and temperature always have the same pressure. d. molecules of different gases with the same mass and temperature always have the same molecular mass. e. molecules of different gases with the same mass and temperature always have the same average kinetic energy.