What is the LEL range for ethane?

The LEL (Lower Explosive Limit) range for ethane is indeed 3.0 - 12.5%. This range defines the minimum concentration of ethane in air that can ignite. Understanding LEL is crucial for safety in environments where flammable gases are present, such as in mining operations.

For ethane, having a LEL range of 3.0% to 12.5% indicates that at concentrations below 3.0%, ethane will not ignite even in the presence of an ignition source. As the concentration increases beyond 3.0% up to 12.5%, the mixture of ethane and air becomes capable of combustion if an ignition source is introduced. This knowledge is vital for mine foremen and safety personnel, as it aids in monitoring and managing flammable atmospheres to prevent potential explosions.

In the context of the other choices, the ranges provided do not accurately reflect ethane’s LEL, which further clarifies why the correct selection is significant for safety practices in environments dealing with this molecule.