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

• A. 6.022 × 10^{22}
• B. 6.022 × 10^{23}
• C. 1.00 × 10^{6}
• D. 3.01 × 10^{23}

Answer: (B)

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 the number of atoms or particles in one mole of a substance. This value is approximately \$6.022 \times 10^{23}$ particles per mole.
3. Recognize that this number is used to convert between the microscopic scale (atoms, molecules) and the macroscopic scale (grams, moles) in chemical calculations.
4. Identify that the question asks for the number of atoms in one mole, so the answer corresponds directly to Avogadro's number without any additional calculations.
5. Conclude that the correct number of atoms in one mole of a substance is \$6.022 \times 10^{23}$, which is the standard accepted value in chemistry.