🎓 IB Exam Prep

What is Avogadro's number?

A 3.14 × 10²³

B 6.022 × 10²³

C 1.602 × 10⁻¹⁹

D 9.81 × 10¹

✓ Correct Answer: Option B

Avogadro's number (6.022 × 10²³) is the number of particles (atoms, molecules, etc.) in one mole of a substance.