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

• A. 3.01 × 10^{23}
• B. 6.022 × 10^{20}
• C. 6.022 × 10^{23}
• D. 1.00 × 10^{6}

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 approximately \$6.022 \times 10^{23}$ particles per mole.
3. Recognize that this number represents the number of molecules in one mole of a molecular substance.
4. Compare the given options to Avogadro's number to identify the correct value corresponding to the number of molecules in one mole.
5. Conclude that the correct answer is the option closest to \$6.022 \times 10^{23}$ molecules per mole.