Ответ:
2Ca + O2 → 2CaO
CaO + 2HBr → CaBr2 + H2O
CaBr2 + K2CO3 → CaCO3 + 2KBr
CaCO3 → CaO + CO2
CO2 + 2NaOH → Na2CO3 + H2O
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Ответ:
2Ca + O2 → 2CaO
CaO + 2HBr → CaBr2 + H2O
CaBr2 + K2CO3 → CaCO3 + 2KBr
CaCO3 → CaO + CO2
CO2 + 2NaOH → Na2CO3 + H2O