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Avogadro's number is the number of parti...

Avogadro's number is the number of particles present in

A

1 molecule

B

1 atom

C

1 mole

D

1 kg

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Avogadro's Number**: Avogadro's number, denoted as \( N_A \), is a fundamental constant in chemistry. It is defined as the number of particles (atoms, molecules, ions, etc.) present in one mole of a substance. 2. **Definition of a Mole**: A mole is a unit in chemistry that represents \( 6.022 \times 10^{23} \) particles of a substance. This means that regardless of the type of particle (whether it is an atom, molecule, or ion), one mole of that substance contains \( 6.022 \times 10^{23} \) of those particles. 3. **Types of Particles**: The particles counted by Avogadro's number can vary based on the substance being measured. For example: - For elements, it refers to the number of atoms. - For molecular compounds, it refers to the number of molecules. - For ionic compounds, it refers to the number of formula units. 4. **Conclusion**: Therefore, Avogadro's number is specifically the number of particles present in one mole of any substance. **Final Answer**: Avogadro's number is the number of particles present in one mole of a substance. ---
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