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Calcium carbonate can break down to form calcium oxide and carbon dioxide.

CaCO3 → CaO + CO2
The oxygen atoms on the product side are

User Sharron
by
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2 Answers

3 votes
The answer is 3 beacuse
CaCO3 is the main part to decomposing
User Mike Dunlavey
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0 votes

Answer:

balanced because the total number of oxygen atoms is 3.

User Thatcher
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