Understanding the Concepts
* Mole (mol): A unit of measurement that represents a specific number of particles.
* Avogadro's Number: 6.022 x 10²³ particles/mol. This is the number of particles (atoms, molecules, ions, etc.) in one mole of any substance.
* Representative Particles: The basic units of a substance. For molecular compounds like H₂O₂, the representative particle is a molecule.
Calculation
1. Use Avogadro's Number: Since 1 mole of any substance contains 6.022 x 10²³ particles, 2.5 moles of H₂O₂ will contain:
2.5 mol H₂O₂ * (6.022 x 10²³ molecules/mol) = 1.5055 x 10²⁴ molecules of H₂O₂
Answer: There are 1.5055 x 10²⁴ molecules of hydrogen peroxide (H₂O₂) in 2.5 moles.
