Some gaseous hydrogen has to be kept for refilling the generator but it can be also generated on-site.

And no one could figure out how to put enough gaseous or liquid hydrogen into a car to give it a decent cruising range.

Liquid hydrogen is very difficult and dangerous, while gaseous hydrogen doesn't have enough energy per kilogram of gas to be worthwhile.

Large quantities of gaseous hydrogen are stored in underground caverns for many years without any difficulties.

The gaseous hydrogen collects at the top of the absorber, while the liquid ammonia solution flows to the bottom.

In a hydrogen fuel cell car, the power is stored in the form of gaseous hydrogen.

Carbon forms a stronger bond with oxygen so the gaseous hydrogen is left behind.

Here the supplied electrons and the protons that have conducted through the membrane are combined to create gaseous hydrogen.

The reaction also shows the production of gaseous hydrogen, chlorine and aqueous sodium hydroxide.

The solid is dangerously reactive toward water, releasing gaseous hydrogen (H).