Judgement really means to give your own opinion
Anyways can anyone give me tips on how to answer hydrocarbon questions because I really suck at that
Thanks
Before commencing, your prefixes of meth-, eth-, prop-, but-, pent- etc. should be known off by heart first.
The alkane series only has single bonds. The key characteristic of the alkenes series is that somewhere in there, there is a double bond.
A complete structural formula includes the bonds. 1-pentene is basically saying that there is a double bond, coming off carbon #1.
The correct answer is
C=C-C-C-C
with H's coming off the carbons. (Note: if you have a double bond, do not draw in too many H's)
A condensed formula just writes out what's there. For 1-pentene it would be
CH2CHCH2CH2CH3
For heptane this would be
CH3CH2CH2CH2CH2CH2CH3 (count the carbons! The prefix matters!)
For 1-heptene this would be
CH3CH2CHCHCH2CH2CH3
This one might not be obvious. It helps to draw out the complete structural formula whenever you're stuck.
Molecular formulae are easy. Alkanes have formula C
nH
2n+2, whereas alkenes have formula C
2H
2nI'm leaving stuff unanswered because I want you to do some work yourself.