O2 is an example of a molecule
FeCl₂ + 2NH₄OH → Fe(OH)₂ + 2NH₄Cl
Photosynthesis is the process where plants create energy. It requires water, carbon dioxide and sunlight. The end result is glucose, which the plants consume, and oxygen. Cellular respiration requires oxygen and glucose. The end result is carbon dioxide, ATP, and water.
Na releases 1 electron to be stable
Cl requires 1 electron to be stable
both are ionic bonded to be stable