Hippuric acid has the formula.

Options

A. `CH_3CONHCH_2COOH`
B. `C_6H_5CONHCH_2COOH`
C. `C_6H_5NHCOOH`
D. `NH_2CONHCOOH`

Answer

To determine the formula of hippuric acid, we can follow these steps:

### Step 1: Understand the Components
Hippuric acid is derived from the combination of benzoic acid and glycine. Benzoic acid has the formula C7H6O2, and glycine has the formula C2H5NO2.

### Step 2: Write the Structural Formula
Hippuric acid can be represented structurally as follows:
- It contains a benzene ring (C6H5).
- It has a carbonyl group (C=O) attached to a nitrogen (NH).
- There is a carboxyl group (COOH) attached to the carbon chain.

### Step 3: Combine the Elements
From the structural representation, we can combine the elements:
- The benzene ring contributes C6H5.
- The carbonyl and amine groups contribute C=O and NH.
- The carboxyl group contributes COOH.

### Step 4: Count the Atoms
Now, we can count the total number of each type of atom:
- Carbon (C): 9 (6 from the benzene ring + 1 from the carbonyl + 2 from the carboxyl)
- Hydrogen (H): 9 (5 from the benzene ring + 2 from the carbonyl + 2 from the carboxyl)
- Nitrogen (N): 1 (from the amine group)
- Oxygen (O): 2 (from the carboxyl group)

### Step 5: Write the Final Formula
Putting it all together, the molecular formula for hippuric acid is C9H9NO3.

### Final Answer
The formula of hippuric acid is C9H9NO3.

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