Name the alkene with molecular formula `C_(10)H_(20)`

Options

A. Dodecene
B. Undecene
C. Decene
D. Heptene

Answer

To find the alkene with the molecular formula \( C_{10}H_{20} \), we can follow these steps:

### Step 1: Understand the General Formula for Alkenes
Alkenes are hydrocarbons that contain at least one carbon-carbon double bond. The general formula for alkenes is given by:
\[ C_nH_{2n} \]
where \( n \) is the number of carbon atoms.

### Step 2: Determine the Value of \( n \)
Given the molecular formula \( C_{10}H_{20} \), we can see that:
- \( n = 10 \)

### Step 3: Verify the Hydrogen Count
Using the general formula for alkenes:
\[ H = 2n = 2 \times 10 = 20 \]
This matches the hydrogen count in the molecular formula \( C_{10}H_{20} \).

### Step 4: Naming the Alkene
According to IUPAC nomenclature, the name of an alkene is derived from the longest carbon chain containing the double bond. For \( n = 10 \):
- The alkene with 10 carbon atoms is called "decene".

### Step 5: Conclusion
Thus, the alkene with the molecular formula \( C_{10}H_{20} \) is named **decene**.

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