I think I found it The 90 is the mr of the 2 HOOC groups add together Then you subtract 90 from 132 to get the mass of (CH2)n Then divide 42 by 14 the mr of. CH2 To get 3
I think I found it The 90 is the mr of the 2 HOOC groups add together Then you subtract 90 from 132 to get the mass of (CH2)n Then divide 42 by 14 the mr of. CH2 To get 3
I don’t actually do ocr gateway chemistry however I would practice the following : Bonding Mechanisms Equilibria Practicals as they will always come up