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Level 61

## Ignore words

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Stoichiometry
Part of chemistry that studies amounts of substances that are involved in reactions
Reaction stoichiometry
Deals with the mass relationships between reactants and products in a chemical reaction
Reaction stoichiometry is based on...
Chemical equations and the law of conservation of mass
Composition stoichiometry
Deals with the mass relationships of elements in compounds
Mole ratio
A conversion factor that relates the amounts of moles of any two substances involved in a chemical reaction
Mol->Mol
Type one
Mol->Mol->Gram
Type two
Gram->Mol->Mol
Type three
Gram->Mol->Mol->Gram
Type four
limiting reactant
A reactant that is totally consumed during a chemical reaction, limits the extent of the reaction, and determines the amount of product.
excess reactant
the reactant that is not completely used up in a chemical reaction
theoretical yield
the amount of product of interest that will be yielded in a chemical reaction as calculated using stoichiometry
actual yield
measured quantity
percent yield
(Actual Yield/Theoretical Yield) x 100%
Review formulas
See notes and practice problems
Composition Stoichietry
deals with the mass relationship of elements in compounds
Molar Mass
mass in grams of 1 mol of a substance
Percentage Yield
is the ratio of the actual yield to the theoretical yield, multiples by 100
mole
_______is the amount of a substance that contains the same number of particles as the number of atoms in 12 g of carbon-12. That would be 6.02 x 10 23 atoms.
amount of a substance
The mole is the SI unit for
counting
The mole is a _______ unit, like a dozen
6.02 x 10²³ particles
1 mole of carbon -12 =
6.02 x 10 23 atoms of carbon
1 mole of any element =
6.02 X 10 23 atoms of that element
1 mole of any molecular covalent compound =
6.02 X 10 23 molecules of that compound
1mole of an ionic compound =
6.02 X 10 23 formula units of that compound
Reaction stoichiometry (mass moles and molecules)
first you need to recognize the coefficients in fron of compounds in a balanced equation represent the mole rations ( or …
1 example
gA> molA> molB> gB
another example
molecules A>molA>molB> gB
Gas stoichiometry (mass, moles, molecules, and volume)
As a basis for comparing different gases, we often measure their volumes at 1 atmosphere of pressure (1atm and O degrees Celsius) This set of conditions is called standard temperature and pressure or STP