Although all the hydrogen in the sun and the stars will eventually be converted to helium or heavier elements, there is likely to be plenty of hydrogen atoms in outer space. This answer assumes, in line with current cosmological theories, that the universe does not end in a big crunch.
not possible
Wet hydrogen is collected over a water surface.
Hydrogen is an element, the simplest element that makes up over 99% of the Universe's matter.
Hydrogen is highly soluble in air. You won't be able to collect it it over air. Hence other methods are preferred
Switch2hydrogen.com is a fantastic website that sells hydrogen generator equipment. The website also talks about the importance of using hydrogen over gas.
The hydrogen left over.
Ask it.
When Hydrogen Is Passed Over Hot Tubgsten Oxide (WO3) WO3 + 3H2 ----------------> 3H2O + W
It is called wet hydrogen gas because it is collected over water.
Sunlight will degrade any hydrogen peroxide that is in the water. This is why over-the-counter hydrogen peroxide is sold in brown bottles.
Simple enough. get the container of hydrogen and a lit splint (a match will do). open the container and put the match/splint over the opening. If there is a pop noise, it is hydrogen.
When hydrogen gas passed over heated cupric oxide, the hydrogen is oxidized and displaces copper from the copper oxide as metallic copper, because hydrogen is higher than copper in the electromotive series. Water vapor is also produced by the reaction.