If a polyvinyl chloride polymer has a degree of polymerization (DP) of 1000, what is its molecular mass?
Correct answer: A. 63,000 amu
- A. 63,000 amu
- B. 20,000 amu
- C. 1,000 amu
- D. 6,300 amu
Explanation
The molecular mass of a polymer is calculated by multiplying the mass of its repeating unit by its degree of polymerization (DP). For polyvinyl chloride (PVC), the repeating unit is CH2-CHCl, which has a molecular mass of approximately 62.5 amu. Given a DP of 1000, the molecular mass is 62.5 amu × 1000 = 62,500 amu, which rounds to 63,000 amu. Therefore, the correct answer is Option A. The other options are incorrect as they either use an incorrect mass for the repeating unit or do not properly apply the DP in the calculation.
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