# Find the number-average and mass-average molecular masses for a sample of a polyvinyl alcohol that..

Find the number-average and mass-average

molecular masses for a sample of a polyvinyl alcohol that has molecules with the

following percentages and molecular masses:

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Carry out the solution of the kinetic

equation for an uncatalyzed polyesterification if the reaction is assumed

second order in carboxyl groups and first order in hydroxyl groups: