The best and most correct answer among the choices provided by your question is all of the above.
All of the choices given are the best ways to explain a nuclear reaction.
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Endothermic reactions are reactions that require heat in the course of the process. The heat of reaction in this case is positive which means the energy of the products is greater than the energy of the reactants. In this case, the answer to this problem would have to be <span>1. must be greater than the required ΔH </span>
The answer to your question is nitrogen dioxide
This is seen in the first law of Thermodynamics stating that matter and energy cannot be destroyed nor created.
I think it is called a loess. Please correct me if I am wrong.