Question

Cornbustion reactions are aways​

Answer 1

Explanation:

Combustion reactions always involve molecular oxygen O2. Anytime anything burns (in the usual sense), it is a combustion reaction. Combustion reactions are almost always exothermic (i.e., they give off heat). ... When organic molecules combust the reaction products are carbon dioxide and water (as well as heat).

Answer 2

Answer:

involve molecular oxygen

Explanation:

Combustion reactions always involve molecular oxygen O2. Anytime anything burns (in the usual sense), it is a combustion reaction. Combustion reactions are almost always exothermic (i.e., they give off heat). ... When organic molecules combust the reaction products are carbon dioxide and water (as well as heat).