•
ViCi = VfCf
•
Strong electrolytes are good conductors of electicity
To find the molecular formula of 2 given masses:
o
Convert grams into mols of given compounds
o
Divide the one with more mols, by the one with less mols
This tells you how many of each compound are in the emp. Form.
o
Find the Empirical Formula [(grams/mol)+(grams/mol) = Empirical Formula Mass
o
To find molecular formula:
[(Molar mass of compound)/(emp. Formula mass)] = # Formulas per mol
o
Now multiply emp. Formula by # Formulas per mol
•
(Avg. Amu)=(%ele.2)(Amu ele2) + (100%ele2)(A) Solve for A
To find # of atoms
o
Find total molar mass
o
Convert grams to mols
o
Multiply into avogadro’s mol
o
Turn into atoms
Calculating Mass %
o
Divide the mass of the element you’re trying to find % of
By the molar mass of the compound it’s in
Finding empirical formulas
o
Convert each element to mols
o
Divide each
mol by the smallest #
Finding pressure
o
[Mols(nR)(T)]/V
o
Avg. KE = (3/2)(RT)
o
Root Mean Square Velocities (avg. velocity of gas particle) = (3RT/M)^(1/2)
Finding concentrations
o
Concentration = amount of X / Vsoln
o
Convert compound from g
mols
o
Divide my volume of solution in Liters
Force = Mass x Acceleration (F=MA)
o
Acceleration is due to gravity
•
SI units of force is Newton
o
1 newton = 1kgm/s^2 also the force unit
Pressure = force/area
SI unit of pressure is Pascal (PA), 1 PA = 1kg/ms^s = 1n/m^2
o
Standard Atmosphere = 101,325 PA= 1 atm = 760 torr = 760 mmhg
•
Boyle’s Law
o
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 Spring '07
 Van Koppen
 Chemistry, Mole

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