Mutagens
human excreta , waste water contaminated by detergents, dirt or oil, industries etc...........................:)
Compounds are pure chemical substances with two or more different chemical element that can be separated by chemical reactions. Examples include water compounds (oxygen and hydrogen), and table salt (sodium and chlorine).
Examples of chemical changes of matter include, but are not limited to: color change, formation of a precipitate, formation of a gas, change in energy.
Alkaloids are naturally occurring chemical compounds. Examples include caffeine, quinine, and atropine.
I do not know the exact/possible chemical composition. It is mainly composed of carbon (which means it needs to include oxygen) so the composition would include C and O.
Gyprock is an Australian manufacturer of gypsum-based products. They do not intentionally include asbestos in any of their products.
Examples of chemical changes that occur around us include burning wood (combustion), rusting of iron (oxidation), and cooking food (chemical reactions in the ingredients). Examples of chemical changes that occur within us include digestion of food (enzymatic reactions), respiration (breaking down glucose for energy), and metabolism of medications in our bodies.
Chemical properties of paper can include flammability/nonflammability or decompostition/lack of decompostition at high temperature.
Bulk chemical is a term used to refer to chemicals that are produced in large scale. Examples include sulphuric acid, chlorine, ammonia and ethene.
Exapmples of igneous rocks include granite, basalt, gabbro, rhyolite, pumice, and andesite. Since rocks are mictures, they do not have chemical formulas.
Mutagens may be of physical, chemical, or biologic origin. Examples of physical mutagens include Ultraviolet rays, radioactivity, and over high temperature. Examples of chemical mutagens include nicotine, pesticides, and methane. Examples of biologic mutagens include bacteria and viruses.
Check link for what's in a cigarette.