among the various oxides of Manganese which has maximum percentage of combined oxygen
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Explanation:
Pyrolusite is a mineral consisting essentially of manganese dioxide (MnO
2
), and is important as an ore of manganese.
Hausmannite is a complex oxide of manganese containing both di- and tri-valent manganese, with the formula Mn
2+
Mn
2
3+
O
4
. Hence, the percentage of oxygen in Mn
3
O
4
will be less than that in MnO
2
.
Brunite is a complex oxide of manganese containing both manganese oxide and dioxide.
Hence, the percentage of oxygen will be maximum in pyrolusite.
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