Can I please get help? Im not sure​

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Question:

Can I please get help? Im not sure​

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Answer:(3) Equals the mass of CaO plus the mass of CO₂  Explanation:The important principle to remember is the Law of Conservation of Mass — the total mass of the reactants must equal the total mass of the products.       Reactants ⟶ products            CaCO₃ ⟶ CaO + CO₂ Mass of CaCO₃ = Mass of CaO + mass of CO₂

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