Un Kilogramo de metal ¿tiene la misma masa que un kilogramo de aire, pero si los comparamos tienen algo que es diferente. ¿ QUE ES LO
DIFERENTE?.

a. they must be certified by the avma.

explanation:

mark brainliest and have a great day!

yes it is balanced

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.