507. It is known that the molar refraction of a liquid is approximately equal to its molar volume. Based on this, calculate the radius of the substance (solvent) molecule. based on the density ρ and the refractive index n given below for the corresponding problem number and assuming that the molecule has a spherical shape.

task solvent ρ, g/cm3 n
507 ethyl acetate C4H8O2 0.913 1.3798

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