Nitrogen is a relatively cheap gas because it is an inert gas widely present in the atmosphere, so it is widely used in the national economy, such as laser cutting, chemical shielding gas, chemical synthesis, electronic industry pharmaceuticals, etc. The following example illustrates

Nitrogen is a relatively cheap gas because it is an inert gas widely present in the atmosphere, and therefore is widely used in the national economy, such as laser cutting, chemical protective gases, chemical synthesis, and electronic industry medicines. The following example demonstrates