3. Which of the following could represent a chemical reaction? Circles represent atoms, and circles that are connected to each other represent molecules. The different colored
circles represent different kinds of atoms.
+ OO +
+ 0 + 0
A
+ OO + OO-
+
+ CO
B.
+ CO + CO -->
+ 0 + 0
C.
+ C +
+ Oo + OO →
D.
Explain (10 Points)

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.