Answer:Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic. exothermicA description of a chemical reaction that releases heat energy to its surroundings.
Hydrocarbons are compounds formed by only hydrogen atoms and carbon.
Answer (2)
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The inner core us the densest
No because it would have to take an exponential amount of time in which the sun is more likely to explode.
