Question

equation for the reaction of carbon 2 oxude and coke to produce ethyne.

what solid remains when the following are heated
1.lithium trioxonitrate
2.potassium trioxonitrate
3.calcium trioxonitrate

Answer 1

You can't get C2H2 from CO and C without adding a source of hydrogen.

For the second question, please note that nitrate is NO3^- and the trioxo is not necessary. LiNO3 is lithium nitrate. Heating most nitrates produces the metal oxide; i.e., Li2O, K2O, and CaO.