VOA-Sparrow Clinic The VOA-Sparrow Clinic is a collaboration between Volunteers of America and Sparrow Hospital, providing both physical and mental health care to the homeless in the Lansing area. Their location is 430 N Larch in Lansing.
Answers. Best Answer: Proposed to be an element by Carl Wilhelm Scheele in 1774, manganese was discovered by Johan Gottlieb Gahn, a Swedish chemist, by heating the mineral pyrolusite (MnO2) in the presence of charcoal later that year.
Manganese(IV) oxide (manganese dioxide, MnO 2) is used as a reagent in organic chemistry for the oxidation of benzylic alcohols (i.e. adjacent to an aromatic ring). Manganese dioxide has been used since antiquity to oxidatively neutralize the greenish tinge in glass caused by trace amounts of iron contamination.n 2+ often competes with Mg 2+ in biological systems. Manganese compounds where manganese is in oxidation state +7, which are restricted to the unstable oxide Mn 2 O 7 and compounds of the intensely purple permanganate anion MnO 4 â , are powerful oxidizing agents.