408. According to the results of equilibrium centrifugation at 20 C, it was found that the logarithm of the concentration of tobacco mosaic virus depends linearly on the square of the distance to the centrifuge's axis of rotation. Calculate the molar mass of the virus if ln(c)= -1.7 at x2 =44.0 cm2 and ln(c) = -2.8 at x2 = 41.2 cm2 at an angular rotation rate of 6.185 s-1 . The specific gravity of the virus is 1.36 g/cm3, the density of the solvent is 1.00 g/cm3.

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