411 REFERENCE · Wikibooks
AP Chemistry/Constants and Equations
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Don't Need to Memorize
D = density = M/V
m = mass, molality
M = Molar mass, molarity
n = number of moles
P = pressure
T = temperature
t = time
V = volume
Need to Memorize
Avogadro's number = 6.0223
R = ideal gas constant = 0.0821 L•atm/K•mol
PV = nRT (Ideal gas equation)
1 atm = 760 torr = 760 mm Hg
STP = 273K and 1 atm (100kPa)
1 cal = 4.184 J = energy needed to warm 1 g (1 mL) of water by 1K.
add links to explanations of each variable/constant