You should be worried about the safety of a healthcare product if you see which of the following claims made?
a. fda approved!
b. miracle cure!
c. scientifically tested!
d. effective in double-blind study!

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