Cracking the SAT Chemistry Subject Test

&   Boiling Point   Depression

i:   whole   number  equaling    the     number  of  particles   a   substance

dissolves   into

k:  solvent constant

m:  molality    (NOT    molarity)

molarity    =   

molality    =   

mole    fraction    =   

Ideal Gas Law

•           PV  =   nRT

P   =   pressure    in  atm (or mmHg    or  torr)

V   =   volume  in  liters

n   =   number  of  moles   of  gas particles   in  the container

R   =   the ideal   gas constant

T   =   temperature in  Kelvin

To  calculate   the ideal   gas constant,   use the following   formula: