The molecular structure formula of polyacrylamide can be represented as:

Conh2[CH2-CH]N

This formula represents the repeating unit in the polymer chain of polyacrylamide. Each unit consists of an acrylamide monomer (CH₂=CHCONH₂) in which the amide group (-CONH-) connects the monomers together to form the polymer chain. The subscript 'n' indicates the number of repeating units in the polymer chain, which can vary depending on the molecular weight and polymerization process.

Polyacrylamide is a synthetic polymer composed of repeating units of acrylamide monomers. The molecular structure of polyacrylamide can be represented as:

[-CH₂─CH(CONH₂)-]n

In this structure, the brackets encompass the repeating unit, and "n" represents the number of repeating units in the polymer chain. Each repeating unit consists of three main parts:

1. A backbone chain: The backbone chain is formed by a series of carbon atoms linked together. In polyacrylamide, the backbone is composed of a long chain of carbon atoms represented by "-CH₂─" (where "-CH₂-" indicates a methylene group) and has a linear structure.

2. Functional groups: The functional groups to the backbone are what give polyacrylamide its desired properties. In the case of polyacrylamide, the functional group is the acrylamide group, represented by "-CH(CONH₂)-". The acrylamide group contains a carbonyl group (C=O) and an amide group (-NH₂) attached to the backbone carbon chain.

3. Terminating groups: The polymer chain is terminated by additional chemical groups to maintain stability and prevent further polymerization. However, these groups may vary depending on the specific synthetic method or desired properties of the polyacrylamide.

It's worth noting that polyacrylamide can exist in different forms, such as linear or cross-linked structures, depending on the polymerization process and the presence of cross-linking agents. The molecular structure described above represents the basic repeating unit in the linear form of polyacrylamide.