cauciuc : -(-CH2-CCl=CH-CH2-)n-
practic : n·M monimer = 44,25kg n = 44,25/88,5 = 0,5 kmoli
teoretic : n monomer = 0,5·100/80 = 6,25 kmoli
deoarece monomerul are 4 atomi de C in molecula ⇒
nCH4 = 4·n monomer = 4·6,25 = 25 kmoli
PV = nRT V = 25·0,082·400/2 = 410 l