Chemistry

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.

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  1. 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)

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  2. Also some of the mass is gone as CO2, a gas.

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