Gaseous chlorine is how many times heavier than air?

Gaseous chlorine is approximately 2.5 times heavier than air. This characteristic is significant in various contexts, particularly in wastewater treatment facilities where chlorine is used as a disinfectant. The molecular weight of chlorine gas (Cl2) is about 70.9 g/mol, while the average molecular weight of air is roughly 28.97 g/mol. This difference in density means that chlorine gas will tend to settle in low-lying areas, increasing the importance of proper ventilation and safety measures when using chlorine in confined spaces. Understanding the weight of chlorine relative to air is crucial for ensuring that safety protocols are followed to prevent the buildup of this gas, which can lead to hazardous conditions for workers.