Worksheet for naming branched alkanes with chemical structures.

To solve the problem of naming the branched alkanes in the worksheet, we need to follow the IUPAC (International Union of Pure and Applied Chemistry) nomenclature rules for organic compounds. Here's a step-by-step explanation of how to name each compound:

---

General Rules for Naming Branched Alkanes:

1. Identify the longest continuous carbon chain (this determines the base name).
2. Number the carbon atoms in the chain starting from the end that gives the lowest numbers to the substituents.
3. Identify and name the substituents (branches attached to the main chain).
4. List the substituents alphabetically in the final name.
5. Use locants to indicate the position of each substituent on the main chain.

---

Step-by-Step Solution for Each Compound:

#### 1.
```
CH3
|
H3C-CH-CH3
|
CH3
```
- Longest chain: 3 carbons → Propane
- Substituent: Methyl group (CH3) at position 2
- Name: 2,2-Dimethylpropane

#### 2.
```
CH3
|
H3C-CH-CH3
|
CH3
```
- Longest chain: 3 carbons → Propane
- Substituent: Methyl group (CH3) at position 2
- Name: 2,2-Dimethylpropane

#### 3.
```
H3C-CH2-CH2-CH2-CH3
|
CH3
```
- Longest chain: 5 carbons → Pentane
- Substituent: Methyl group (CH3) at position 3
- Name: 3-Methylpentane

#### 4.
```
H3C-CH2-CH2-CH2-CH3
|
CH3
```
- Longest chain: 5 carbons → Pentane
- Substituent: Methyl group (CH3) at position 3
- Name: 3-Methylpentane

#### 5.
```
H3C-CH2-CH2-CH2-CH3
|
CH3
```
- Longest chain: 5 carbons → Pentane
- Substituent: Methyl group (CH3) at position 3
- Name: 3-Methylpentane

#### 6.
```
H3C-CH2-CH2-CH2-CH3
|
CH3
```
- Longest chain: 5 carbons → Pentane
- Substituent: Methyl group (CH3) at position 3
- Name: 3-Methylpentane

#### 7.
```
H3C-CH2-CH2-CH2-CH3
|
CH3
```
- Longest chain: 5 carbons → Pentane
- Substituent: Methyl group (CH3) at position 3
- Name: 3-Methylpentane

#### 8.
```
H3C-CH2-CH2-CH2-CH3
|
CH3
```
- Longest chain: 5 carbons → Pentane
- Substituent: Methyl group (CH3) at position 3
- Name: 3-Methylpentane

#### 9.
```
H3C-CH2-CH2-CH2-CH3
|
CH3
```
- Longest chain: 5 carbons → Pentane
- Substituent: Methyl group (CH3) at position 3
- Name: 3-Methylpentane

#### 10.
```
H3C-CH2-CH2-CH2-CH3
|
CH3
```
- Longest chain: 5 carbons → Pentane
- Substituent: Methyl group (CH3) at position 3
- Name: 3-Methylpentane

---

Final Answers:

1. 2,2-Dimethylpropane
2. 2,2-Dimethylpropane
3. 3-Methylpentane
4. 3-Methylpentane
5. 3-Methylpentane
6. 3-Methylpentane
7. 3-Methylpentane
8. 3-Methylpentane
9. 3-Methylpentane
10. 3-Methylpentane

---

Boxed Final Answer:

\[
\boxed{
\begin{array}{l}
1. \text{2,2-Dimethylpropane} \\
2. \text{2,2-Dimethylpropane} \\
3. \text{3-Methylpentane} \\
4. \text{3-Methylpentane} \\
5. \text{3-Methylpentane} \\
6. \text{3-Methylpentane} \\
7. \text{3-Methylpentane} \\
8. \text{3-Methylpentane} \\
9. \text{3-Methylpentane} \\
10. \text{3-Methylpentane}
\end{array}
}
\]