Molar mass refers to the mass of a substance per unit quantity, which is represented by the symbol M. Its relationship with relative molecular mass is that relative molecular mass is equal to molar mass in numerical value.
Taking nitrogen (N2) as an example, the relative molecular mass of nitrogen is 14×2=28, so the molar mass of nitrogen is 28g/mol. This means that the mass of 1 mol nitrogen is 28g, which contains 23 nitrogen molecules of 6.02×10.
Molar mass is one of the basic properties of matter, which is usually used to describe and calculate the mass and quantity of matter under specific conditions. In scientific research and industrial production, it is very important to know the molar mass of substances.
Application scope of nitrogen:
Nitrogen is widely used. First of all, nitrogen plays an important role in industry. For example, in the chemical industry, it is used to make synthetic ammonia, nitric acid and other chemicals. In iron and steel industry, nitrogen is used to protect metal materials from oxidation at high temperature. In the electronics industry, nitrogen is often used as a protective gas to protect internal electronic components from the external environment.
Nitrogen is also widely used in daily life. For example, in the food industry, nitrogen is used to maintain the freshness of food and is often added to beverages to increase taste and stability. In the medical field, nitrogen is used to make anesthetics, and it is also used for disinfection and antisepsis of medical instruments.
Nitrogen also has important military uses. For example, in the manufacture of missiles and rockets, nitrogen is used as a part of propellant, and in the manufacture of airplanes and ships, nitrogen is also used as a part of airtight materials.
Nitrogen also plays an important role in scientific research. For example, in physical and chemical research, nitrogen is used as a protective gas and a research gas to help scientists carry out various experiments and research.
Nitrogen is widely used in industry, daily life, military and scientific research.