Amount of Substance

Relative masses
1. Relative atomic mass
  1. The average mass of one atom of an element/1/12th the mass of an atom of C12
2. Relative molecular mass
  1. Average mass of one molecule/1/12th the mass of an atom of C12
3. Relative formula mass
  1. (For Ionic compounds) Average mass of one ionic compund/1/12 the mass of C12
Avogadro's constant
1. The number of atoms in 1g of hydrogen is 6.022 x 10^23
2. Definition: The number of atoms in 12g of carbon 12.
3. The mole contains this number of particles
Number of moles
1. n = m/Mr
2. n = c x v
3. n = vol x 24
4. n = PV/Rt
Formula
1. Empirical Formula
  1. 1) Atoms 2) Mass 3) Moles 4) Ratio 5) Formula
2. Molecular Formula
  1. Divide actual Mr by the Mr of the empirical formula
Ionic Equations
1. Get rid of spectator ions
Balencing equations
1. Fractions can be used for gasses, make sure numbers add up on both sides

Zusammenfassung der Ressource

	Erstellt von Beth Ritchie vor etwa 11 Jahre