131.Solving a chemistry problem
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131.Solving a chemistry problem
20. Determine the molecular weight of ethylcellulose in toluene using the viscometric method data:
Concentration of solution C, kg / m 3 2.0 4.0 6.0 8.0 10.0
The reduced viscosity of the polymer solution
η beats / C
0.16 0.19 0.21 0.24 0.26
Constants: K = 1,18⋅10 -4, α = 0,67.
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