I’m unsure how to answer this because I don’t know How much bacteria there was What bacteria it was And what the conditions of the bacteria are This chart is from Dr. Jason from the math forum http://mathforum.org/library/drmath/view/64555.html hope this helps!
The answer is splitting of water molecules. This happens during the light stage of photosynthesis where light energy from the sun is absorbed by chlorophyll is used to split water molecules into hydrogen ions and oxygen. This process is called photolysis. The hydrogen ions joins the dark stage or the light independent stage, while oxygen gas is either released to the atmosphere or used for cellular respiration.