144. Solving a chemistry problem

144. Solving a chemistry problem

1.20. In the manufacture of an oil-in-water emulsion, the diameter of the droplets with machine stirring is 4 × 10–6 m, and with manual agitation, 2 · 10–5 m. Find how many times the specific surface area of the oil emulsion with machine agitation is greater than with manual agitation. The density of the oil is 0.8 · 103 kg / m3.

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