Which of the following is a false statement about reactions? a. mass can’t be created or destroyed in a chemical reaction b. compounds that form have different properties than the ‘old’ reactants. c. atoms are rearranged in a reaction and joincto form new molecules d. when a reaction gets cold, that means energy is destroyed

D is absolutely false.  Energy cannot be destroyed.  It can only be transferred.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.