Berlin Water

that must be the heavy water they were using in WW2 to produce "the bomb" :-)

AMU of Oxygen is 16; AMU of Hydrogen is 1. :)

Ture but no correct, unless you are counting by mass only. It takes the full complent of protons and neutrons to make oxygen, otherwise you would have several extra hydrogen and a few spare neutrons laying about, but a good joke anyway, thanks

and I stupidly thought it took 1 part of oxygen to 2 parts of hydrogen to make water, there goes all that time studying chemistry at Uni.

Not sure your point here; Oxygen has a mass number of 8 which corresponds to 16 AMU's (8 protons, 8 neutrons). An average hydrogen nucleus contains 1 proton and 0 neutrons.

Sure, you have some isotopes, and sure you even have some mass defect effects going on due to the strong nuclear force, but all and all, I think I'm right on this one, at least to the signifigant figures I presented.

Otherwise, I might need to quit my day job. :)

Steve

I would! H20 = water, 2 hydrogen atoms and one oxygen atom = water, mass has nothing to do with it.

I agree with you mass ratios but so what?

I don't know many with the patience to count atoms when preparing mixtures... Given tanks of equal pressure, volume and temperature, it would take 8 tanks of oxygen and one of hydrogen to make the molar ratio come out right.

Steve

so?

My chemistry study are long gone but if i remember corectly, the molecular weigth is exactly to tell that a mole (6.0274*10 exp. 24 molecules) will weigth that amount of grams and at normal temps and pressure 1 mole of any gas is 22.4 litres. That way you need 1 mole of pure oxygen whit 2 of hydrogen to make one mole of water (since water is liquid it would take less space). Also since you can't find pure oxygen in nature (in it's natural form 2 atoms of oxygen combine to give O2) and the same thing with hydrogen (H2) you will have 2 * H2 + O2 + energy = 2 H2O. Again i can be completely wrong since my last course of chemistry was 29 years ago ( i wonder how i still remembers all those numbers).