9.14 From the experimental data below, determine the average value of the half-coagulation time O and calculate the number of primary particles n1 for each time interval after the start of coagulation:
Coagulation time t, s 0 30 60 120 240 480
Total number of particles in 1 cm3 n*10-8 20.2 14.7 10.8 80.25 4.89 3.03

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