Which of the following is an example of potential energy?* A firework exploding.
O A race car gaining speed towards the finish line.
O A phone sitting on the desk.
O Boiling water.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

level 4 to level 2 : ))

c. electrical charges of ionic bonds.