The number of S-S bonds in sulphur trioxide trimer `(S_(3)O_(9))` is

Answer

To determine the number of S-S bonds in sulfur trioxide trimer (S₃O₉), we can follow these steps:

### Step 1: Understand the Structure of S₃O₉
Sulfur trioxide (SO₃) is a molecule that consists of one sulfur atom bonded to three oxygen atoms. When we talk about the trimer (S₃O₉), we are referring to three sulfur trioxide units coming together.

### Step 2: Visualize the Trimer
In the trimer, the three sulfur atoms are connected through oxygen atoms. Each sulfur atom is bonded to three oxygen atoms, and they form a cyclic or branched structure.

### Step 3: Identify S-S Bonds
An S-S bond is a direct bond between two sulfur atoms. In the case of S₃O₉, the sulfur atoms are not directly bonded to each other; instead, they are bonded to oxygen atoms.

### Step 4: Count the S-S Bonds
Since there are no direct connections between the sulfur atoms in the structure of S₃O₉, we conclude that there are zero S-S bonds present in the trimer.

### Conclusion
The number of S-S bonds in sulfur trioxide trimer (S₃O₉) is **0**.

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