1. A polyamide was prepared by condensation polymerization of hexamethylene diamine (9.22g) with adipic acid (11.68g) at 280C. Analysis of the final polymer product showed that it contained 2,6*10^-3 mol of carboxylic acid groups and no amine groups. Calculate the degree of polymerization (Xn) of this polyamide and its number- average molecular weight (Mn).
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