Which of the following is a source of chemical energy commonly used by humans? a. water flowing in a river b. a bicycle c. a sandwich d. turning on a lightswitch

Consider this initial-rate data at a certain temperature for the reaction described by

What are the two largest greenhouse gases

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.