What does the A Hof a reaction represent? A. It represents the heat involved in a reaction.
B. It represents the thermal energy in a system.
C.
represents the randomness of the products.
D. It represents the usable energy in a reaction.
egation.

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth