Approximately what is the specific gravity of natural gas?

The specific gravity of natural gas is commonly around 0.6 to 0.8, depending on its composition. The correct choice indicates that natural gas typically has a specific gravity that is less than air, which has a specific gravity of approximately 1. This means that natural gas is lighter than air, which is an important characteristic for certain applications, such as safety measures in case of gas leaks. Knowing that natural gas is lighter than air helps in understanding how it disperses in the atmosphere, which is crucial for both safety protocols and effective ventilation systems in residential and commercial settings.

Other options do not accurately reflect the specific gravity of natural gas. Thus, the correct choice provides a realistic measure of its properties as compared to other gases.