What is the chemical equation for fireworks?
You have a problem. You aren’t relating to us, or you don’t know that there are different types of fireworks. Different types are made of different mixtures of compounds, often 3-5, but a minimum firework could be made with 2 or perhaps even 1 compound. Ask this again in a better format. There is no way to write and equation when there are so many possible reactants that could factor in…not to mention timing, etc.