- #1
luckis11
- 272
- 1
That 1 litre of hydrogen contains the same number of molecules with 1 litre of oxygen.
http://www.engineeringtoolbox.com/gas-density-d_158.htmlCan you post links of this evidence? I have my doubts you see. E.g. when you say "1 litre of hydrogen" you mean that they let a particular weight of liquid hydrogen to evaporate in a box of 1 litre which contained vacaum, and also etc?
No, it is an experimental result. You weight a box (with known volume) with vacuum, and weight it filled with hydrogen at standard pressure and temperature, and calculate the difference. No liquids involved.this density of hydrogen is derived by Avogadro΄s hypothesis?
That's why you compare it to a box with vacuum. Or, once you measured the density of air that way, you can subtract it via calculations.because as this is a low density comparing to water΄s, I am not sure whether e.g. any surrounding buoyncy because of air is taking place
That would be equivalent to the chemical reaction suggested above. You always get twice the volume of hydrogen compared to the volume of oxygen in water electrolysis, for example.THUS, something at electrolysis or counter-electrolysis can be the only proof I can think of.
Can you post links of this evidence?
if we have weight of 70 kilograms of liquid hydrogen in 1 metre^3 I am not sure that its mass i.e. the number of its noucleons is (70/1000) (the number of nucleons in 1000 kilograms of water)
http://www.engineeringtoolbox.com/gas-density-d_158.html
Note these STP densities:
[itex]O_2: 1.4290 kg/m^3 [/itex]
[itex]H_2: 0.0899 kg/m^3 [/itex]
And these molecualr weights:
[itex]O_2: 32.000 [/itex]
[itex]H_2: 2.016 [/itex]
Dividing through:
[itex]O_2: 1.4290 kg/m^3 / 32.000 = 0.0447 kg/m^3 [/itex]
[itex]H_2: 0.0899 kg/m^3 / 2.016 = 0.0446 kg/m^3 [/itex]
Can you post links of this evidence? I have my doubts you see. E.g. when you say "1 litre of hydrogen" you mean that they let a particular weight of liquid hydrogen to evaporate in a box of 1 litre which contained vacaum, and also etc?
I think #2 and #4 for instance contain circular reasoning
when you say "1 litre of hydrogen" you mean that they let a particular weight of liquid hydrogen to evaporate in a box of 1 litre which contained vacaum, and also etc?
One quotes atomic masses and the other a formula both assumed as known. How were they known? Originally via Avodgadro's hypothesis I think. At the start all anyone had was combining weights, so for Dalton water was HO, and the atomic mass of oxygen would have been 8.How so?
Right, but now we have mass spectrometry for a direct measurement.How were they known? Originally via Avodgadro's hypothesis I think.
At the start all anyone had was combining weights, so for Dalton water was HO, and the atomic mass of oxygen would have been 8.
Right, but now we have mass spectrometry for a direct measurement.