Succinic acid, also known as succinic acid, is an important organic compound. Its molecule is composed of carbon, hydrogen, and oxygen elements, and the molecular formula is $C_ {4} H_ {6} O_ {4} $.

Calculate the molecular weight of succinic acid according to the relative atomic mass of each atom: carbon (C) is about 12, hydrogen (H) is about 1, and oxygen (O) is about 16.
1. Calculate the total relative atomic mass of carbon atoms:
- The succinic acid molecule contains 4 carbon atoms, 4 dollars\ times12 = 48 $.
2. Calculate the total relative atomic mass of hydrogen atoms:
- containing 6 hydrogen atoms, 6 dollars\ times1 = 6 $.
3. Calculate the total relative atomic mass of oxygen atoms:
- containing 4 oxygen atoms, 4 dollars\ times16 = 64 $.
4. Calculate the molecular weight of succinic acid:
- adding the total relative atomic mass of carbon, hydrogen and oxygen atoms, 48 dollars + 6 + 64 = 118 $. Therefore, the molecular weight of succinic acid is 118, which is of great significance in many fields of chemistry, such as the ratio of organic synthesis reactants, the analysis of product purity, and the biochemical study of succinic acid metabolism in organisms.