The chemical equation for respiration is: C6H12O6 + 6O2 6CO2 + 6H2O Glucose + Oxygen Carbon Dioxide + Water. Splits the 6-carbon glucose molecule into two 3-carbon pyruvic acid molecules and 2 ATP molecules.This process is anaerobic, not requiring the presence of molecular oxygen.he chemical equation for respiration is: C6H12O6 + 6O2 6CO2 + 6H2O Glucose + Oxygen Carbon Dioxide + Water. Splits the 6-carbon glucose molecule into two 3-carbon pyruvic acid molecules and 2 ATP molecules.