Which statement correctly describes a chemical reaction?

1)reactants come out of a reaction.
2)energy is always released.
3)bonds between atoms break and new bonds form.
4)products go into a reaction.

The best and most correct answer among the choices provided by the question is the second choice "Energy is always released."

The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants.

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Hno3(aq) → h+(aq) + no3−(aq). picture ii best represents the strong acid hno3. strong acids are strong electrolytes