What vapor density characteristic is associated with Hydrogen Gas?

Hydrogen gas has a vapor density that is less than 1 because it is significantly lighter than air. Vapor density is a measure of a substance's density relative to air, which has a vapor density of around 1. Since hydrogen (H₂) has a molecular weight of about 2 grams per mole, it is much lighter than the average air molecules, primarily composed of nitrogen and oxygen.

As a result, hydrogen gas will rise and disperse quickly in the atmosphere when released. This property is crucial in various applications, including safety measures in environments where hydrogen gas is present, as it can lead to the gas accumulating in higher areas if not properly ventilated. Understanding hydrogen gas's vapor density helps in designing equipment and safety protocols in wastewater treatment facilities and other industrial settings where this gas might be encountered.