Many molecules of compound A join together to form polymer B.
Complete the displayed formula equation which represents this reaction.

This is an example of addition polymerisation. It occurs with monomers that have a C=C double bond (alkenes). 1. **Initiation:** The process is started, often using high pressure, high temperature, and a catalyst. 2. **Propagation:** The double bond in one monomer molecule breaks open. One of the electrons from the double bond forms a new single covalent bond with an adjacent monomer molecule. This process repeats, adding more and more monomers to create a long chain. 3. **Drawing the Polymer:** To represent this on paper: - Focus on the two carbon atoms that were part of the double bond. - Change the C=C double bond in the monomer to a C-C single bond in the polymer. - The other groups attached to these carbons (-H, -H, and the ester group) remain attached in the same way. - Draw single bonds extending from each of these two carbons outwards, passing through the brackets. These represent the bonds linking to the next repeating units in the chain. - Enclose the entire repeating unit in square brackets and write a subscript 'n' to signify a large number of repeating units.