Answers

2016-02-15T20:44:45+05:30
oxidation number of o is -2
so
x+2(-2)=0
x=4
therefre valency of mn in mno2 is 4
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2016-02-15T20:51:22+05:30
Since O is 2- in valency and there are 2 O in MnO2, the O2 component represents a total valency of 4- (2 x 2 = 4). For MnO2 to be electrically neutral in this format, Mn must have a valency of 4+.
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