No! You'll be playing that game more than you'll be doing any work. It's the exact OPPOSITE of a productive game!
Phthalic acid has two acids (dicarboxylic) and urea two nitrogen, so N, N`.
In this particular case I'm going with spelling.
Depends, first decide which you want to hook up with. Mathew, Justin or Dylan. A tip: When you choose, don;t act interested in anyone but that person. For Dylan: Never give up. He messes up alot....
Nn2 or, if N = n, then n3