Raising the temperature speeds up the rate of a chemical reaction by increasing?
a. the effectiveness of collisions, only
b. the frequency of the collisions, only
c. both the effectiveness and the frequency of the collisions
d. neither did the effectiveness or the frequency of the collisions

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.