Question

why do substances burn

Answer 1

The chemical process in which a substance reacts with oxygen to give off heat is called combustion. Substances that undergo combustion are called combustible substances.

so substances burn

Answer 2

Burning means combustion. A chemical process.to start a combustion we need 3 things. 1 Fuel 2 oxygen 3 ignition temperature…Oxyegen is available in the air..So if some combustible matter gets ignition temperature it starts fire.

C+O2= Co2.
l hope it will help you...

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