DF 8 

==Amount in moles = volume/ molar volume Mass = amount in moles times molar mass==

• The ratio of moles in a balanced symbol equation is the same as the ratio of volumes of gases

  - This means you don’t need to convert volumes to moles you can just apply the stoichiometry to the volume

• Ideal gas equation is ==PV = nRT==
• ==Pressure (Pa) times volume (M^3) = number of moles times gas constant (8.31) times temperature (K)==

  - These are strange units so remember to convert

  - To convert between dm^3 and cm^3 you need to times and divide by 1000