having a little trouble writing net ionic equations: 1. the equation when you dissolve C02 (carbon dioxide) in water. I cant figure out the ions because is there such a thing as a C+4 ion? or do you use a carbonate ion? 2. the net ionic equation when ammonia gas reacts with oxygen gas when heated to make nitrogen monoxide and water vapor. i believe the overall equation is: NH3 + O2 --> NO + H2O but again, i cannot find any ions. can someone help me out on these quesitons? thanks.