It depends on whats burning, but I would say Carbon Dioxide... Please correct me if wrong
water
Chemical energy
It really depends on a number of factors, such as oxygen abundance and type of fuel you're talking about. But the products are mainly Carbon dioxide, Water, nitrogen oxides, Sulfur oxides, and occasionally, Ozone molecules are produced.
Carbon dioxide
carbon dioxide, CO2
Carbon dioxide and water.
Carbon dioxide
When a fuel burns, it undergoes a combustion reaction. Combustion has two main products. These products are water and carbon dioxide.
Colors are produced by means of energy. When a chemical burns, related atomic structure of chemicals excites the electrons which results in the emission of visible light and forms into various colors.
burns, detonates, oxidizes, etc.
carbon dioxide
This actually depends on the type of fuel, but often, water vapor, pollutants and energy.