What is the chemical formula for the conversion of carbon dioxide into oxygen

Plant photosynthesis carbon dioxide + water - light / chloroplast → organic matter (mainly starch) + oxygen: 6CO2 + 6H2O - light / chloroplast → C6H12O6 + 6o2 sodium peroxide - reacts with carbon dioxide to form sodium carbonate and oxygen: 2na2o2 + 2co2 = 2na2co3 + O2

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