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Chemistry SOL Formulas
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from all the Williams notes packets... please feel free to add anything i may have missed!!especially Vest people cause Williams hasn't covered everything yet so yall may have formulas we haven't learned yet
Key Concepts:
Terms in this set (31)
percent error
| accepted value-experimental value / accepted value | x 100
Celsius to Kelvin conversion
K = C + 273
mass number
# neutrons + # protons
atomic mass
Σ (fractional abundance)(mass number)
percent composition
(mass of element/mass of compound) x 100
speed of light in a vacuum constant
c = 3.0 x 10^8 m/s
speed of light in a vacuum formula
c = (wavelength)(frequency)
Planck's constant
h = 6.63 x 10^-34
energy of a photon
Ephoton = (Planck's constant)(frequency)
energy of a photon
Ephoton = (Planck's constant)(speed of light in a vacuum constant)/wavelength
# Empirical formula units used in the molecular formula
MM of molecule/ MM of empirical formula
specific heat capacity
Cp = q/mass x change in temperature
heat energy required (q)
q = Cp x mass x change in temperature
latent heat formula
q = l x mass
Dalton's law of partial pressure
PT = P1 + P2 + ...
Dalton's Law over water
PT = Pwater + Pgas
Combined Gas Law
P1V1/n1T1 = P2V2/n2T2
Boyle's Law
P1V1 = P2V2
Charles' Law
V1/T1 = V2/T2
Gay Lussac's Law
P1/T1 = P2T2
Avogadro's Law
V1/n1 = V2/n2
Ideal Gas Law
PV = nRT
R for Liters
.0821 L x atm / mol x K
R for kPa
8.314 L x kPa / mol x K
R for torr
62.4 L x torr / mol x K
Ideal Gas Law if not given n
PV = (mass/MM)RT
Ideal Gas Law using density
MM = DRT/P
Graham's Law
r1 / r2 = √MM2 / √MM1
molarity (of a solution)
M = moles of solute / liters of solution
formula for dilution problems
M1V1 = M2V2
pH + pOH = ___
14
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