Question

Un amestec de pentan si pentina cu masa de 20g are 34% alchina. Ce masa are carbonul continut de pentan?

Answer 1

amestecul contine 34% pentina(C5H8) si 66% pentan(C5H12)

100g amestec......34g pentina.......66% pentan

20g...........................x= 6,8g................y=13,2g

M,C5H12=(5X12gC+12gH)/mol= 72g/mol

in 72g pentan..................60gC

13,2g...............................X

X= mC= 13,2X60/72=............................CALCULEAZA !!!!