The H - O - O bond angle in `H_(2)O_(2)` (g) is

Options

A. `107.28^(@)`
B. `109.28^(@)`
C. `104.5^(@)`
D. `94.8^(@)`

Answer

To find the H-O-O bond angle in hydrogen peroxide (H₂O₂) in the gaseous phase, we can follow these steps:

### Step 1: Understand the molecular structure of H₂O₂
Hydrogen peroxide has a unique structure where two oxygen atoms are bonded to each other and each oxygen atom is also bonded to a hydrogen atom. This results in an open book-like structure.

**Hint:** Visualize the structure of H₂O₂ to understand how the atoms are arranged.

### Step 2: Identify the bond angles
In H₂O₂, we are specifically interested in the H-O-O bond angle. This angle is formed between the two hydrogen atoms and the central oxygen-oxygen bond.

**Hint:** Remember that bond angles can vary between different phases (gaseous vs. crystalline).

### Step 3: Consider the phase of H₂O₂
The bond angle can differ depending on whether H₂O₂ is in the gaseous phase or crystalline phase. In the gaseous phase, the bond angles are typically more spread out due to less steric hindrance.

**Hint:** Look for specific data or references that provide bond angles for H₂O₂ in different phases.

### Step 4: Find the bond angle in the gaseous phase
According to the information provided, the H-O-O bond angle in the gaseous phase of hydrogen peroxide is 94.8 degrees.

**Hint:** It can be helpful to memorize common bond angles for frequently encountered molecules.

### Step 5: Conclusion
Thus, the H-O-O bond angle in H₂O₂ (g) is 94.8 degrees.

**Final Answer:** The H-O-O bond angle in H₂O₂ (g) is **94.8 degrees**.

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