Chemistry formulas

Studying hard for my Chem midterm. Gunna be really hard. Just reviewing youtube videos on the concepts and equation formulas. Here are some of the ones we are working with.

Ideal Gas Law:
  PV=nRT

Charles Law: rate of Effusion  ( molar masses are FLIPPED over)
 
rate A          sqrt of molecular mass  A
-------- =  -----------------------
rate B         sqrt of molecular mass  B

Daltons Law: partial pressure formula

Avogadro's Law:
   ALL gases with 1 mol of gas are equal to 22.4 Liters in volume at Standard Temp and pressure, no matter what kind of gas it is.

Boyle's Law:
  P1V1= P2V2

Charles Law:  (basic) (volume and temp)(temp always on bottom)
  V1       V2
----- = ------
  T1        T2

Guy- Lussacs Law: (pressure and temp) (temp always on bottom)
  P1       P2
----- = ----
  T1       T2

Combined Gas Law: (temp always on bottom)
   P1V1      P1V1
-------  = ------------
    T1           T2

     http://www.youtube.com/watch?v=JTSTuaTnYYI&feature=related