Three, because you end up w/ three "OH" and three "H". (oxygen and hydrogen and hydrogen).
There is only one molecule of water in a water molecule.
depends on the synthesis. Glycerine and three moles of fatty acid would produce 3 molecules of water. Acetic acid and ethanol would produce 1 molecule etc.
36g water contains 12.046 x 1023 molecules.
How much water?? ml or L