[PLUG-TALK] Chemistry help needed

[John Jason Jordan]

All the information that I once had about chemistry has left the
premises. 

I need to make a 2.25% brine. Basically this is nothing more than
dihydogen monoxide with sodium chloride in solution. The problem is
what quantity of salt (by weight) to what quantity of water (by
volume). You would think Mr. Google could deliver this information, but
he doesn't know either.