We’re asked to determine what happens to the matter that composed the log that burns.
We know that when a small log completely burns in a campfire:
Recall that according to the Law of conservation of mass, matter is not created or destroyed:
This means that:
mass of reactants = mass of product
mass unburned log + mass of oxygen, O2 (used to burn the log) = mass of ash
When a small log completely burns in a campfire, the mass of the ash is much less than the mass of the log.
What happens to the matter that composed the log?
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What scientific concept do you need to know in order to solve this problem?
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