Answer:
5156 Â
Explanation:
Chains of monomers that are being linked together constitute what is called polymers. in this question; we are to compute the end to end separation (direct distance between molecule ends), in Angstroms, of a coiled PVC molecule.
Using the following approach:
The first step is to determine the repeating units in polymer
The number of repeating unit = average molecular weight/ atomic weight of PVC
Given that:
average molecular weight = 256,131 g/mol
atomic weight of PVC = 62.498 g
Then;
The number of repeating unit = 256,131 g/mol / 62.498 g = 4098.227143 mol
Now the distance is calculated by using the formula:
d = (C-C) × sin 109.5/2
C-C bond length = 1.54 angstroms
tetrahedral bond angle = 109.5°
Then d = (1.54) × sin 109.5/2
d = 1.258
Thus ; the end to end separation is :
4098.227143 × 1.258 = 5155.57 Â
The answer is 5156 Â (since no decimal should be included )
