1. The problem statement, all variables and given/known data solid ammonium dichromate will produce (when heated) solid chromium (IV) oxide, nitrogen gas, and water vapor. Write the balance equation and net ionic equation. 2. Relevant equations First i wrote: (NH4)2Cr207 (s) --> CrO2 (s) + N2 (g) + H2O (g) 3. The attempt at a solution first i just cannot balance this thing. im usually very good at it but this one doesnt seem to work. do i have it written down correctly so far? secondly, in net ionic equations, what do you do with gases (and liquids)? i know solids do not ionize so you do not change them. but in this case, are there ANY ions? how can i write a net ionic equation here? also if the molecule is molecular (covalent) does it ionize at all or do you also just leave it? can it "dissolve" in solution (eg CO2)? i would assume you do not change it since it is made up of covalent bonds and not ionic ones. hence it written the same in the net ionic equations. thanks for the help.