Different Formula Representation

• Empirical formula - e.g. C3H8

  • simplest whole number ratio of atoms of each element in the compound
• Molecular formula - e.g. C3H8

  • the true number ratio of each element in the compound
• General formula - CnH2n+2O

  • compounds in the same homologous series follow a general formula rule
• Structural formula - e.g. CH3 CH2 CH3

  • shows how the atoms are bonded, hydrogens are grouped by carbons
• Displayed formula

  • shows how all atoms are bonded