Question

Problema nr 957,va rog

Answer 1

nxCH2=CH-CH=CH2 + nyCH2=CH-CN ---> -[-(-CH2-CH=CH-CH2)x-(-CH2-CH-CN)y-)-]-n 


MC4H6=54g/mol
MC3H3N=53g/mol

n=m/M=>m=n*M=2*54=108g C4H6

n=m/M=>m=3*53=159g C3H3N
mN=3*14=42g N

m amestec=159+108=267g

℅N=mN/M*100=42/267*100=15.73℅