139. Solving a chemistry problem
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139. Solving a chemistry problem
Calculate the surface tension of hexane at 20 ° C if the following data are obtained by counting drops: the number of hexane drops is 65, the number of water drops is 25. The density of hexane is 0.6595 g / ml, the density of water is 0.9982 g / ml. The surface tension of water at 20 ° C is equal to 72.75 • 10-3 J / m2.
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