1.1 mole concept and avogadro's constant

/1.1.1/

• mole concept
  • applies to all kinds of particles (atoms, molecules, ions, electrons, etc.)
  • amount of substance, measured in moles (mol)
  • Avogadro's constant L = 6.02 x 10^23 mol^-1, the number of carbon atoms in 12 g of ^12C
  • one mole of any substance contains 6.02 x 10^23 particles of that substance

/1.1.2/

• determining the no. of particles and amount of substance
  • 1 mol of hydrogen atoms (H) = 6.02 x 10^23 H-atoms
  • 1 mol of hydrogen molecules (H2) = 6.02 x 10^23 H-molecules
  • 1 mol of hydrogen molecule atoms = 12.04 x 10^23 H-atoms

1.2 formulas

/1.2.1/

• relative atomic mass
  • Ar = atomic mass unit
  • an atom's mass in relation to ^12C (12 atomic mass units)
• relative molecular mass
  • Mr = relative molecular mass
  • a molecule's in relation to ^12C

/1.2.2/

• calculating the mass of one mole of a species from its formula
  • h