CAN U EXPLAIN WHY 12 MOLECULES OF WATER AS SUBSTRATE ARE USED IN THE EQUATION OF PHOTOSYNTHESIS? Share with your friends Share 0 Aвнιѕнєк Mιѕняα answered this 6 molecules of water is used in making of o2 and again 6 molecules are released 4 View Full Answer G K answered this thnx a lot 1 G K answered this bt can u explain in detail i didnt understand 1 Fayisa Koppath answered this 6co2+12H2O________>C6H12O6+6h20 +6C02..here H2 from h2o reduces CO2 into C6H12O6 O2 EVOLVED IS ALSO FROM GIVEN 12H2O 1