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For nitrogen in HNO3 it is '5'.

To calculate oxidation numbers.

  1. Use oxygen as the stabndard at '-2'

  2. -2 x 3 = -6 is the oxygen moiety.

  3. Since hydrogen only oxides to '+1' as H^(+).

  4. Create a little sum +1 +N - 6 = 0

To balance then N must be '+5'.

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lenpollock

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11mo ago

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