I am really stuck on these so will try and explain further and use dots.

1. I have come up with normal heptane on this but not sure
.......CH3...CH3
.......|.....|
CH3-CH-C-CH2-C-CH2-CH3
....|....|...|
....CH3..CH2.CH2
.........|
.........CH3
In the first row CH3 and CH3 are both directly about the "C"'s in row two, in the third row, CH3 under CH, CH2 under CH2 and CH2 under C, in the fourth row, the CH3 is under the first CH2

2. Name this compound
.....CH3
.....|
CH=C-CH-CH-CH3
........|
........CH3
In the first row, CH3 is above the first CH, in the third row, CH3 is below the second CH

3. name this compound -
...........H..H
...........\../
........... C=C
.........../..\
..........CH3..CH2CH3

to the left of the equal sign you have h on top c in middle and CH3 under the H on the right side of equal sign you have H on H, C underneath to the left of H and CH2CH3 on the third row under H

4. name this compound

CH3-CH2....H
\.../
........C=C
......../..\
........H...CH2-CH-CH3
................|
................CH3

on the second row the C on left is to the right of the CH2 with the H on the third row under the CH2. On the right side of equal H is on top, c in the second row is to the left of H and on the third row CH2 is underneath H, fourth row, CH3 under CH of third row

1. The compound you have described is correctly identified as heptane. To name it, we can count the number of carbons and make note of any functional groups or branching.

Starting from the left side:
- The first carbon has two methyl groups attached.
- The second carbon is connected to the third carbon by a single bond.
- The third carbon is connected to the fourth carbon by a single bond, and it also has two methyl groups attached.
- The fourth carbon is connected to the fifth carbon by a single bond.
- The fifth carbon is connected to the sixth carbon by a single bond, and it also has two methyl groups attached.
- The sixth carbon is connected to the seventh carbon by a single bond.
- The seventh carbon is the last in the chain and has three hydrogen atoms attached.

Therefore, the name of the compound is 3,3-dimethylhexane.

2. To name this compound, we first count the number of carbons and identify any functional groups or branching.

Starting from the left side:
- The first carbon has three hydrogen atoms attached.
- The second carbon is connected to the third carbon by a double bond.
- The third carbon is connected to the fourth carbon by a single bond, and it also has three hydrogen atoms attached.
- The fourth carbon is connected to the fifth carbon by a single bond.
- The fifth carbon is the last in the chain and has three hydrogen atoms attached.

Since there is a double bond between the second and third carbons, this compound is an alkene. Therefore, the name of the compound is 1-butene.

3. To name this compound, we first identify the functional group and the branching.

From left to right:
- On the left side of the double bond, there is a hydrogen atom attached to the carbon.
- In the middle, there is a carbon double-bonded to another carbon.
- On the right side of the double bond, there is a hydrogen atom, a carbon attached to two hydrogen atoms, and another carbon attached to three hydrogen atoms.

Since there is a carbon double bond in the compound, it is an alkene. Therefore, the name of the compound is propene.

4. To name this compound, we again count the number of carbons and identify any functional groups or branching.

Starting from the left side:
- The first carbon has three hydrogen atoms attached.
- The second carbon is connected to the third carbon by a single bond and has two methyl groups attached.
- The third carbon is connected to the fourth carbon by a double bond.
- The fourth carbon is connected to the fifth carbon by a single bond.
- The fifth carbon has one hydrogen atom and a propyl group attached.
- The sixth carbon is connected to the fifth carbon by a single bond and has three hydrogen atoms attached.

Since there is a carbon double bond in the compound, it is an alkene. Therefore, the name of the compound is 3-methyl-1-pentene.