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24 Cards in this Set
- Front
- Back
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balancing equation
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use this
in front of the equation X+Y=Z+W |
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empirical formula
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simplest whole number ratio of the elment in the molecule
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molecular formula
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exact number of atoms of each element in a molecule
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% composition
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%comp = mass of x in formula/formula weight of compound x100
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compound
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pure substance that is composed of two or more element in a fixed porportion
95% alcohol, how many scoupe you take out there is always 95% alcohol in the solution |
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molecule
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combination of two or more atoms held together by covalent bond
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molecular mass or weight
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sum of the atomic mass of the atom that mae up the molecule
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molar mass or weight
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mass per mole of th substance
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find molecular formula when molecular weight is given
C5H7N Mole W.=162 g/mol |
5(12)x+7X+14X=162
81X=162 x=2 thus C10H14N2 |
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%yield
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actual yield/ thoretical yield X100
theoretical yield, solve by stoichiometry actual yield through experiment (given in the problem) |
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mass of a single atom
Cl |
atomi weight / avagadro' #
35/6.022X10^23 atoms =5.81X10^-23 g/atom |
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mass of an molecule
ex O2 |
32g/6.022X10^23
= 5.31X10^23g/molecule |
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chemical rxn
based on two factor |
1. based on drving force of the rxn
-single and double displacement rxn 2. based on composition f reactant and product -combination and decomposition |
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single displacement rxn
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A+BC -> AB+c
aka redox reaction |
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double displacement rxn
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AB+CD-> AC+BD
ex neutralization and precipitation |
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neutralization rxn
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type of double displacement
ex. titration involve acid and base reactng to form salt and usually water |
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precipitation rxn
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type of double displacement
produce solid product solution and solubility is precipitation rxn |
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standard state for C (carbon)
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is solid (graphite)
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combination rxn
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A+B ->AB
ex. combustion, formation, corrosion |
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combustion rxn
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type of combination
one of the reactant change oxidation state |
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formation rxn
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type of combination rxn
reactant is an element in standard state |
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corrosion rxn
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typ of combination exn
metal deterioate when liquid, gas, or O2 is present |
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decomposition rxn
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AB ->A+B
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law of conservation of mass
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mass of the product must equal to the mass of reactant
ex 5.9g of Reactants yield 1.4 g of product A how many gram of product B is produced 5.9-1.4=4.5g |
