Answer: Gunpowder
Explanation:
Gunpowder is made by mixing potassium nitrate with two fuels (atoms that can combine with oxygen atoms and release energy), carbon (charcoal) and sulfur. The oxygen atoms leave the nitrates and move onto the carbon and sulfur atoms, releasing a buttload of energy.
One molecule of water contains two atoms of hydrogen and one atom of oxygen, the atomicity of water is three.
Biology is the study of life
Lipids are in a class called fat or lipid solvents.