Which best describes what happens when molecular compounds melt?

A. Molecules arranged in an irregular pattern change to a regular pattern.

B. Molecules move more slowly.

C. Molecules separate into their component atoms.

D. Molecules arranged in a regular pattern change to an irregular pattern.

Answer:

a. energy is absorbed in the reaction.

explanation:

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.

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

The answer is neonhope it

The correct answer is:   [a]:   the "stratosphere" .