On the Analysis of the Molecular Weight of Ammonium Fluoride
The ancient desire to understand the subtlety of matter is to know it first. To know is to study the nature of matter, the molecular weight of ammonium fluoride is one of the important items of chemical inquiry.

Ammonium fluoride is composed of the combination of ammonium root and fluoride ion. Ammonium root ($NH_ {4 }^{+}$）， nitrogen, the relative atomic mass is about fourteen, and hydrogen, the relative atomic mass is about one, so the formula weight of ammonium root is about 14 dollars + 4\ times1 = 18 $. Fluoride ion ($F ^{-}$）， its relative atomic mass is about nineteen.

Therefore, the molecular weight of ammonium fluoride ($NH_ {4} F $) is the sum of ammonium root and fluoride ion formula, that is, 18 dollars + 19 = 37 $.

Looking at this molecular weight has profound implications for the application of chemical industry and the measurement of reactions. In chemical industry, knowing its molecular weight can reveal the ratio of materials, determine the process of reaction, and ensure the quality of products. In reaction measurement, the ratio of reaction can be calculated according to the molecular weight, and the direction and limit of reaction can be deduced.

Therefore, detailed study of the molecular weight of ammonium fluoride is the basis for chemical study and practice, which can inspire wisdom, clarify the application of chemical industry, and is the key to scientific progress.