How many particles are present in one mole of a substance?

• A. 2.066 × 10^{23}
• B. 3.026 × 10^{22}
• C. 6.022 × 10^{23}
• D. 6.023 × 10^{22}

Answer: (C)

Verified step by step guidance

1. Understand that one mole of any substance contains a specific number of particles (atoms, molecules, ions, etc.), which is a fundamental constant in chemistry known as Avogadro's number.
2. Recall the value of Avogadro's number, which is defined as the number of particles in exactly one mole of a substance.
3. Write down Avogadro's number as \$6.022 \times 10^{23}$ particles per mole.
4. Recognize that this number applies universally to atoms, molecules, or formula units depending on the substance being measured.
5. Conclude that the number of particles in one mole of a substance is \$6.022 \times 10^{23}$, which matches the correct answer choice.