I assume you mean "hydrogen". That's an element - meaning that it's quite difficult to make it from other elements. However, hydrogen is the most abundant element in the Universe (and a fairly abundant element on Earth's crust), so there is really no need to make it. Among other things, you can extract it from water, which consists of about 1/9 hydrogen by mass.
Hydrogen gas molecules
it is the hydrogen that burns to make gas hot
Zeppelins used hydrogen gas as the lifting gas to make them buoyant in the air.
No. Hydrogen gas is Hydrogen molecules floating around. They are looking for Oxygen molecules with which to make water.
Many.
Hydrogen gas is highly flammable; you can make it burn with the slightest spark.
... hydrogen gas. This is a displacement reaction in which magnesium displaces hydrogen in water to form magnesium oxide and hydrogen gas.
Yes. Burning hydrogen gas in air produces water vapor.
hydrogen
Hydrogen
HYDROGEN
Hydrogen is a colorless, odorless, and tasteless gas that is the lightest element on the periodic table. It is highly flammable and is commonly used in industries such as petroleum refining and ammonia production.