The Mole Concept

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  • The Mole Concept
    • All matter is made of small particles
    • amount of substance measured by counting particles
      • Compound: molecules/ ions
      • Element: atoms
    • counting unit: moles
      • SI unit: mol
    • Number of particles (N) = number of moles (n) x Avogardro's Constant
      • Avogardro's constant -> 6.02 x 10^8
      • Particles = molecules = ions
    • Relative Atomic Mass (Ar) = Relative Molar Mass (Mr)
    • Number Of Moles (mol) = Mass (g) / Molar Mass (g/mol)
    • Percentage composition = [(Number Of Moles x Avogardro's Constant) / Relative Molar Mass] x 100%
    • Molecular Formula vs Empirical Formula
      • Molecular Formula : N2H2 Empirical Formula : NH2
    • Molar Volume in GAS
      • 1mol = 24dm^3

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