Write the reaction equation: c-co-co2-nahco3-na2co3-co2

1) 2C + O2 = 2CO (when carbon interacts with oxygen, carbon monoxide is formed);

2) 2CO + O2 = 2CO2 (when carbon monoxide interacts with oxygen, carbon dioxide is formed);

3) CO2 + NaOH = NaHCO3 (when carbon dioxide interacts with sodium hydroxide, sodium bicarbonate is formed);

4) NaHCO3 + NaOH = Na2CO3 + H2O (when sodium bicarbonate interacts with sodium hydroxide, sodium carbonate and water are formed);

5) Na2CO3 = Na2O + CO2 (when sodium carbonate decomposes, sodium oxide and carbon dioxide are formed).

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