80. Calculate the degree of swelling of gelatin in water and the swelling rate constant, if the mass of the substance before swelling is 1.09 * 10-3 kg, and the maximum volume of absorbed water depending on the swelling time:
Swelling time t, min 50 100 150
Volume of absorbed water Vl*10-6, m3 6.05 10.46 13.57

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