ASAP Just answer the reasoning and the story is there if you need it (probably do though)

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

What is the chemical formula of magnesium bromide? a. mgbr2 b. mgbr c. mg2br2 d. mg2br

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products