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 = 6.02×10²³

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.

AP Chemistry

The Basics · Periodicity · Solids and Liquids · Gasses · Reactions · Stoichometry · Thermodynamics · Solutions · Acids and Bases · Equilibrium · Electrochemistry · Nuclear Chemistry · Organic Chemistry

Appendix

Constants and Equations · About the AP Exam