Thermal decomposition is a chemical reaction where heat causes one substance to break into two or more different substances. The heat is used to break down the bonds holding the atoms of the original molecules together, ... More »

H2O2 is the molecular formula of hydrogen peroxide. It is a chemical compound containing hydrogen and oxygen, which decomposes according to the following reaction: 2 H2O2 ? 2 H2O + O2. It is also known as perhydrol or ox... More »

A chemical change is a process where two substances combine to form one or more new substances. This process is referred to as a chemical reaction, and it is not reversible. More »

According to Locust Valley Central School District, the carbon dioxide-oxygen cycle is the process through which carbon dioxide and oxygen move through the natural environment by photosynthesis, respiration, combustion a... More »

Chemical energy is that which is either released or absorbed when a chemical reaction takes place, such as the release of heat and electrical energy from a hydrogen fuel cell. Another example is the heat release derived ... More »

An autotroph is an organism that synthesizes food from inorganic substances by using chemical energy or light, according to the American Heritage Dictionary. Types of autotrophs include some kinds of bacteria, green plan... More »

The chemical composition of saliva is 98 percent water and 2 percent other substances such as electrolytes or minerals (sodium and potassium), mucus (mucopolysaccharides and glycoproteins), antibacterial compounds (thioc... More »