Explain how the temperature of a substance is related to the kinetic energy of its molecules

The faster molecules are moving together, heat starts to form. Whereas it is the opposite if molecules are moving slower.

Explanation:

Because an increase in heat is just an increase in the vibrational energy of the atoms, or molecules of a substance. So if you increase the temperature and hence the heat, there is more movement (vibration) in the atoms which translates to more kinetic energy.

the maximum mass of nh3 is nh3 in grams

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.