How did they fill the intrepid with hyrodgen gas?
480599
Hydrogen gas was generated on site by the action of sulphuric acid on iron filings in a large, covered container.  The gas generated was then pumped into the balloon.
106668
The external tank on the space shuttle uses liquid Hydrogen and liquid Oxygen.  I hope that helps.
121280
Well clearly it belongs in the Gas element but i dont really understand what you mean by the question though.  :&#92;
679730
It has gaseus ingredients in it.  Take some GasX
451402
None!\n\nAtmosphere is made up of Nitrogen (78%), Oxygen (21%),Argon (0.9%) and other gasses e.g Carbon dioxide, Methane, Rare (inert) gases (0.1%)
768717
It has hydrogens all around the outside if it which are going to have a partial posative charge on each so they will readily bind to other substances in the air and effectivley trap them.
401900
you would have to find the hydrogen somewhere.
970781
Potential of Hydrogen.
261779
Aw. Still not fast enough. Two people beat me!\n\nWhen you burn gas of any type you will produce water vapor as part of the chemical reaction. The water vapor condenses as it cools and dribbles out when the tail pipe is lower than the rest of the pipe.
891931
initially only 10-29% of air is filled because the air inside is heated it naturally expands and occupies the rest of the volume when it expands the density of helium decreases and hence the baloons goes up because the density of air inside is leser then the air outside
632987
not sure, i think its some kind of gas?
712651
Mostly hydrogen, some helium, and relatively small amounts of various other elements.
1073622
The cheapest source of course is water, but getting hydrogen from water is expensive. Other sources of hydrogen induce\nsodium borohydride NaBH4, in which then added to water is will give out hydrogen gas.
937218
ice is converted to water and water to gas.
593566
filled with gas or water.  otherwise it sinks (see maracaibo city in venezuela, some parts currently 2m below sea level due to sinking)
269454
The gas is turned into liquid by compressing it and well mixed up with water. When we shake the soda it turns back to gas and hence needs more room than it has.
461954
Apply an electric current. The hydrogen and oxygen atoms will be seperated from one another. The hydrogen atoms will be attracted to the negative pole, the oxygens will migrate to the positve poles.\n\nThey can be collected in gaseous forms if you have the poles isolated from one another.\n\nBoiling it will do nothing but convert water molecules from their liquid form to a gaseous state. The molecules will still be intact.