Answer
$m = 192.17 g/mol$
Work Step by Step
Required:
Compute the repeat unit molecular weights for poly(ethylene terephthalate).
Solution:
From Table 14.3, each repeat unit consists of 10 carbons, 8 hydrogens and 4 oxygens. $A_{C}, A_{H},$ and $ A_{O}$ represent the atomic weights of carbon, hydrogen and oxygen, respectively.
$m = 10(A_{C}) + 8(A_{H}) + 4(A_{O}) = 10(12.011 g/mol) + 8(1.008 g/mol) + 4(16.00 g/mol)= 192.17 g/mol$
