The intrinsic viscosity and the molar mass were determined by diffusion of natural light on $5$ fractions considered to be isomolecular of polystyrene in solution in butanone. The measurements are carried out at $25C.$

we give the value of $(\frac{C}{(I-I_0)}{)}_{,c}=0$ also de value of $P_d$ the slope at the origin of the angular dependence of $(\frac{C}{(I-I_0)}{)}_c=0.$

The slope at the origin has the expression $($ SEE PIC FOR THE EXPRESSION AND TABLE$)$

$$Calculate the molar masses of the $$fractions$.$

Calculate the radius of gyration of the molecules.

$$Calculate the coefficients K and a of the Mark Houvink equation for PS in butanone.

$$Calculate the radii of gyration of molecules using the Flory Fox relation.