What is the definition of light?

the natural agent that stimulates sight and makes things visible.

Explanation:

Light, or Visible Light, commonly refers to electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation, as the name suggests, describes fluctuations of electric and magnetic fields, transporting energy at the Speed of Light (which is ~ 300,000 km/sec through a vacuum).

Explanation:

fe 55.85 g/mol and h2o 18.02 g/mol.

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.