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3. These are chains of chemical units linked together to make one long molecule.​

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Answer:

Polymers are large molecules made by joining smaller units together in long chains. The chemical and physical properties of the polymer are very different to that of the constituent smaller units. ... a polymer composed of two or more different types of monomer unit is called a heteropolymer.

Explanation:

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Answer:

Polymers

are large molecules made by joining smaller units together in long chains. The chemical and physical properties of the polymer are very different to that of the constituent smaller units. ... a polymer composed of two or more different types of monomer unit is called a heteropolymer.

Explanation:

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