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Calculate the oxidaiton number of underl...

Calculate the oxidaiton number of underlined atoms of the following : `underline (N)O_(3)^(-)` .

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`underline (N)O_(3)^(-)`
`x+3(-2)=-1`
`x-6=-1`
`x=-1+6=+5`
Oxidation number of N in `NO_(3)^(-)` is `+5`.
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