Answer
$mass = 20.00 kg + 8.49 kg - 2.466 kg = 26.02 kg$
Work Step by Step
Required:
mass of the resulting polymer
Solution:
One mole of water is given off for every repeat unit produced; this corresponds to:
(136.85 mol)(18.02 g/mol) = 2,466.04 g or 2.466 kg given the molecular weight of water is 18.02 g/mol.
The mass of poly(ethylene terephthalate) is just the sum of the masses of the two reactant materials, computed in 15.40a, minus the mass of water released. Thus:
$mass = 20.00 kg + 8.49 kg - 2.466 kg = 26.02 kg$
