Can it be proved that water is really twice as much hydrogen as it is oxygen?

Answer 1

So what you need to do is use the electricity to break the molecules in to H2 and O2 gases, capturing one at the - electrode and the other at the + electrode (I forget which goes where). Place the electrodes under water so that the gases rise into a glass vessel that is calibrated for volume so that you can measure the volumes of each. You will note that one column has twice the volume of the other. If you release this carefully and under teacher advice and supervsion, you'll see that it burns with a blue flame -- this is hydrogen.

Measuring the volumes is accurate, and not dependent on atomic mass. All gases have the same volume given the same number of atoms or molecules.

Thus, it would be proven.

Answer 2

Run electricity through the water to split the molecules into just oxygen and hydrogen. Capture the oxygen and hydrogen. Weigh both. Do some calculations with molecular weight and you'll see if you have twice as many hydrogen atoms as oxygen.

Answer 3

but you do not have 2ice as much hydrogen as oxygen because formula for water is H20. 2 Hydrogens and 1 oxygen but mass of the hydrogen is significantly less than that of the oxygen.

Oxygen = 16 roughly
Hydrgoen = 1.0 roughly

Answer 4

Yes. The molecules can be separated.