Posted by Jess on .
I have a question which asks...
What is the Oxidation number of Nitrogen in Cu(NO3)2
I know the answer is 5+ but how do you get that??
Cu= 2+
O= 2 (Theres 3 of them so 2x3=6...then, theres a two out of the brackets so 6 x 2 =12)
+2  (12)= 10? And then what?
I think my method is wrong. :/ It's really frustrating and i've been at the same question for over an hour now.

Chemistry 
DrBob222,
See your post above.