How does the weight of chlorine gas compare to air?

Chlorine gas is approximately 2.5 times heavier than air. This is because its molecular weight is about 70.9 g/mol, while the average molecular weight of air is around 28.8 g/mol. Due to this significant difference in molecular weight, chlorine gas is denser than air, causing it to settle in low-lying areas. Understanding this property is crucial for safety measures in handling chlorine, as its accumulation can lead to hazardous situations if released in confined spaces. Recognizing the behavior of chlorine gas in relation to air helps operators manage potential risks effectively.