Calculate the volume occupied by 200 g of `SO_(3)` gas at STP and the number of molecules present in it.

Explanation

To solve the problem of calculating the volume occupied by 200 g of SO₃ gas at STP and the number of molecules present in it, we can follow these steps:

### Step 1: Calculate the Molar Mass of SO₃
The molar mass of SO₃ can be calculated by adding the atomic masses of sulfur (S) and oxygen (O):
- Atomic mass of sulfur (S) = 32 g/mol
- Atomic mass of oxygen (O) = 16 g/mol

Since there are three oxygen atoms in SO₃:
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