An increase in temperature affects the reaction rate by A) decreasing the velocities of particles that collide in the reaction.
B) increasing the number of molecules that have sufficient kinetic energy to react.
C) increasing the number of molecules that have sufficient potential energy to react.
D) decreasing the energy that particles need to overcome the energy activation barrier.

Which of the following warnings would an agricultural chemist tell a farmer who wants to recycle his or her own ammonia? recycling ammonia is a difficult process that sometimes takes weeks. recycling ammonia requires a degree in biochemistry or a related field. recycling ammonia can be harmful because it is highly flammable and toxic. recycling ammonia costs too much money considering the price of the necessary chemicals.

One student said that the investigation was not valid (a fair test). write a plan for the investigation that includes improvements to the method and apparatus

Generally, observed behavior that can be formulated into a statement, sometimes mathematical in nature, is called a(n): a. observation. b. measurement. c. theory. d. natural law. e. experiment.