Asked by Jazmine

When a wooden log burns it is essentially undergoing a combustion reaction. Explain why the ashes that form when a log burns have a lower mass than the log had before it started burning.

Answers

Answered by Steve
some of the mass burns off as smoke and floats away. also sparks might carry away some of the mass.

(also, a negligible amount of mass is emitted as heat)
Answered by DrBob222
Also some of the mass is gone as CO2, a gas.
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