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SCX Chemistry · Chapter 7: Moles, particles and stoichiometry

Year 11 SCX · About 16 minutes with activities · Turn your sound on

Chapter 7 · Moles and stoichiometry
20 mL of waterone mouthful
How many atoms?

Chapter 7 recap

  • n = m/M: moles = mass (g) ÷ molar mass (g mol⁻¹).
  • 1 mol = 6.02 × 10²³ particles; atoms = molecules × atoms per molecule.
  • Mass → moles → molar ratio → moles → mass. Don't round until the end.
  • Next: Chapter 8 · Percentage composition and formulas

How many atoms are in a mouthful of water?

Chapter 7 · About 16 minutes · sound on

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