Noun
English Wikipedia has an article on:manganese dioxideWikipedia
manganese dioxide (uncountable)
(inorganic chemistry) The chemical compound MnO2; a brown or black solid used as a component of dry cell batteries.
Accordingly, manganese dioxide catalyses this reaction. Source: Internet
In 2002, more than 230,000 tons of manganese dioxide was used for this purpose. Source: Internet
He discovered that a mixture of salt, manganese dioxide and sulphuric acid could produce chlorine, which Watt believed might be a cheaper method. Source: Internet
It was through his studies of manganese dioxide that Scheele developed his concept of "fire air" (his name for oxygen). Source: Internet
Scheele and other chemists were aware that manganese dioxide contained a new element, but they were not able to isolate it. Source: Internet
Scheele and others were aware that pyrolusite (now known to be manganese dioxide ) contained a new element, but they were unable to isolate it. Source: Internet