6. which of the following statements is true?
A. in an exothermic reaction, the energy of the products is the same as the energy of the reactants.
B. in an endothermic reaction, the energy of the products is the same as the energy of the reactants.
C. in an exothermic reaction, the energy of the products is less than the energy of the reactance.
D. in an endothermic reaction, the energy of the products is less than the energy of the reactants.
7. which of the following is correctly written thermochemical equation?