AP Chemistry/Constants and Equations

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 = 6.02
 * 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.