1.

What is the copolymer composition for azeotropic copolymerization of Acrylonitrile and 1,3-butadiene at 50ᵒC, given that r1=0.02 and r2=0.30?

A. 0.21
B. 0.417
C. 0.84
D. 0.62
Answer» C. 0.84


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