What is the average speed of an object that moves 100 m in 4 seconds and then remaining at rest for 1 second?

What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.

It is really hard for me right know

What is the increase in density of a medium due to wave travel?