Define saturated hydrocarbon and explain that `C_2H_6` is a saturated hydrocarbon.

Explanation

### Step-by-Step Solution:

1. **Definition of Saturated Hydrocarbons**:
- Saturated hydrocarbons are organic compounds that contain only carbon (C) and hydrogen (H) atoms, with carbon-carbon single bonds. This means that every carbon atom in the molecule is bonded to the maximum number of hydrogen atoms possible, resulting in a structure that is "saturated" with hydrogen.

2. **General Formula for Saturated Hydrocarbons**:
- The general formula for saturated hydrocarbons, specifically alkanes, is given by \( C_nH_{2n+2} \), where \( n \) is the number of carbon atoms in the molecule. This formula applies when \( n \) is 1 or greater.

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