2. A colloidal solution of collargol contains silver particles with a diameter of 6*10–8 cm. Determine the number of particles formed when dispersing 0.5 cm3 of silver, the specific surface of the sol and the total surface of the particles, if they have: a) a spherical shape with a diameter (d ) 6  10-8 cm
b) cubic with edge length (ℓ) 10-6 cm.

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