In chemistry, 'mole' is an essential tool for the chemical calculations. It is a basic SI unit adopted by the `14^(th)` general conference on weights and measurements in 1971. A mole contains as many elementary particles as the number of atoms present in 12 g of `""^(12)C` . 1 mole of a gas at STP occupies 22.4 litre volume. Molar volume of solids and liquids is not definite. Molar mass of a substance is also called gram-atomic mass or gram molecular mass. The virtual meaning of mole is plenty, heap or the collection of large numbers. 1 mole of a substance contains `6.022 xx 10^(23)` elementary particles like atom or molecule. Atomic mass unit (amu) is the unit of atomic mass, e.g., atomic mass of single carbon is 12 amu.
XL `N_(2)` , gas at STP contains `3xx10^(22)` molecules. The number of molecules in x L ozone at STP will be

Options

A. `3xx10^(22)`
B. `4xx10^(23)`
C. `6.02xx10^(23)`
D. `3xx10^(24)`

Explanation

To determine the number of molecules in \( x \) liters of ozone (\( O_3 \)) at STP, we can use Avogadro's law, which states that equal volumes of gases at the same temperature and pressure contain an equal number of molecules.

### Step-by-Step Solution:

1. **Understand Avogadro's Law**:
- Avogadro's law states that at constant temperature and pressure, equal volumes of gases contain an equal number of molecules.

2. **Identify Given Information**:
- We know that \( x \) liters of nitrogen gas (\( N_2 \)) contains \( 3 \times 10^{22} \) molecules at STP.

3. **Apply Avogadro's Law**:
- Since the volume of ozone is also \( x \) liters and the conditions (STP) are the same, we can conclude that the number of molecules in \( x \) liters of ozone will be the same as that in \( x \) liters of nitrogen gas.

4. **Conclusion**:
- Therefore, the number of molecules in \( x \) liters of ozone at STP will also be \( 3 \times 10^{22} \) molecules.

### Final Answer:
The number of molecules in \( x \) liters of ozone at STP is \( 3 \times 10^{22} \) molecules.

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