Question

How do I draw the condensed formula for:
1. 2-methyl-2-pentene
2. 5-methyl-1-hexene
3. 2,2,4,5-tetramethylhexane
4. propanoic acid
5. 2-pentyne

Answer 1

It is almost impossible to draw structural formulas on the boards. By the way, you should use the same name when making posts. It helps us avoid confusion. In addition, asking us to do 10 structural formulas is excessive. Here is how you do the first one. If you have a problem with any of the other nine, tell us what you don't understand about them and we can try to help with specific problems. You can post your response directly here without making a new question.
<b>
CH3
|
C - CH3
||
C - H
|
CH2
|
CH3
</b>

Check this out to make sure it is correct.

Answer 2

I would turn the structural formula above into a condensed formula this way.
<b>
(CH3)2C=CHCH2CH3</b>