This sponge is saturated with water.

This compound was made by the chemical combination of two different elements.

These two elements chemically combine to create a new substance.

Carbonization is a type of chemical reaction where organic matter changes under high temperatures and in a state of oxygen deficiency, turning into a substance with carbon as its main component.

When this wood is carbonized, its strength increases.

Alkynes play an important role in organic chemistry.

Alkenes play an important role in organic chemistry.

Alkenes play an important role in organic chemistry.

Alkanes are basic components of organic chemistry.

Hydrogen is the most abundant element in the universe.