Molecular weight data for some polymer are tabulated here. Compute the following:

(a) The number-average molecular weight

(b) The weight-average molecular weight.

(c) If it is known that this material's degree of polymerization is 477, which one of the polymers listed in Table 14.3 is this polymer? Why?

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Molecular Weight Range g/mol Xị Wi 0.05 0.02 8,000–20,000 0.08 20,000–32,000 0.15 0.17 32,000–44,000 0.21 44,000–56,000 0.28 0.29 0.23 56,000-68,000 0.18 68,000–80,000 0.10 0.16 0.05 0.03 80,000-92,000