79. Solving a chemistry problem
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79. Solving a chemistry problem
4. A hydrophilic or hydrophobic surface, if, when benzene is applied to it at 298 K, the surface tension at the benzene-air interface is 28.87 mN / m, the surface - air is 72.75 mN / m and the surface - benzene is 62.2 mN / m?
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