Answer
$m = 114.11 g/mol$
Work Step by Step
Required:
Compute repeat unit molecular weights for nylon 6,6.
Solution:
From Table 14.3, each repeat unit consists of 4 carbons, 6 hydrogens, 2 oxygens and 2 nitrogens. $A_{C}, A_{H}, A_{O},$ and $ A_{N}$ represent the atomic weights of carbon, hydrogen, oxygen and nitrogen, respectively.
$m = 4(A_{C}) + 6(A_{H}) + 2(A_{O}) + 2(A_{N}) = 4(12.011 g/mol) + 6(1.008 g/mol) + 2(16.00 g/mol) + 2(14.007 g/mol)= 114.11 g/mol$