For which of the following reactions are both reactants and products likely to be found when the reaction appears to be complete? explain.
mg+o2⇒2mgo
hf+ h2o⇆h30+f

Evaporation: this is when warmth from the sun causes water from oceans, lakes, streams, ice and soils to rise into the air and turn into water vapour (gas). water vapour droplets join together to make clouds! condensation: this is when water vapour in the air cools down and turns back into liquid water.

High-energy and unstable.