Question

compound name for Cu(NO3)2

Answer 1

yea

Answer 2

I believe that is Copper nitrate.

Answer 3

Copper (II) nitrate
The nitrate anion has a (1-) charge, so in the above molecule the anion part has a total of (2-) as a charge (2x 1- molecule). To balance the charge you need, therefore, to have a (2+) charge on the copper cation, as indicated by the roman number (II) when writing the name of the molecule out.