What unit of measurement is hydrogen measured?

Hydrogen is typically measured in several units depending on the context. In chemistry, it is often quantified in moles (mol), which represents the amount of substance. For gaseous hydrogen, it can also be measured in liters (L) at a given temperature and pressure, or in grams when discussing mass. Additionally, in the context of energy production, hydrogen is sometimes measured in joules or kilowatt-hours (kWh).