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47 Cards in this Set

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homogeneous
all mixed together equally, all in one phase
Heterogeneous
orange juice with pulp, liquid + solid
Density=
mass/volume
Celsius to Fahrenheit
F = (9/5)C + 32
precision
how close measurements in a series are to eachother
accuracy
how close a measurement is to the actual value
kinetic energy
energy due to motion
potential energy
energy due to position
K to C
C = K - 273.15
Law of Conservation of Mass
Mass is conserved in chemical reactions
Law of Constant Composition
compounds compositions are the same ANYTIME, ANYWHERE
Law of Multiple Proportions
Elements combine in specific rations every time
1 mole (mol)
6.022 x 1023
molar mass
the mass in grams of one mol of substance
mass % =
mass of atoms of element/mass of all atoms x 100
find empiricle formula of compound with C=44.77% H=7.52% and O=47.71%
C5H10O4
s
solid
l
liquid
g
gas
aq
aqueous
limiting reactant
reactant that runs out first and determines final amount
theoretical yield
max. possible yield of products, predicted by the balanced equation and reactant quantities
Theoretical yield of ammonia in the reaction of 25.0 g N2 and 6.00 g H2?
Theoretical Yield = 30.4 g NH3
Percent yield =
actual yield/theoretical yield
41.5 g bromobenzene from 25.2 g benzene and excess bromine, percent yield?
81.90%
base
yield OH- in water
Isotope
atoms with same number of protons, but different numbers of NEUTRONS
Empirical Formula
Shows the simplest integer ratio of atoms of each element in a compound
Molecular Formula
Shows the number of Atoms of ach element in a molecule
Structural Formula
Shows the connectivity of the atoms in a molecule
Formulas of hydrogen peroxide
Empirical Formula: HO Molecular Formula H2O2
Acid
Yield H+ ions in water
Binary Aqueous Acids
acid = 2 elements (aq) = in water
Hydrocarbons
contain only carbon and hydrogen
Alkanes
hydrocarbons with only single bonds
Compound
matter composed of two or more different elements chemically bonded together
mixture
two or more substances that are physically intermingled
What mass of iron(III) oxide will be produced if 12.3 g of iron react with an excess of oxygen according to the reaction, 4F(s) + 3O2(g) --> 2Fe2O3(s)
a) 4.4 g b) 8.8 g c) 16.7g d) 17.6 g e) 35.2 g
isomers
compounds with the same molecular formula, but with different properties (shape, etc.)
titrant
a solution of accurately known concentration
analyte
a solution of unknown concentration
equivalence point
exact titrant volume required to completely react with the analyte
end point
the titrat volume slightly in excess of that required to completely react with the analyte
metal activity series
Li, K, Ba, Ca, Na, Mg, Al, Mn, Zn, Cr, Fe, Cd, Co, Ni, Sn, Pb
reversible reaction
reaction that proceeds simultaneously in both directions
equilibrium
the forward reaction and the reverse reaction proceed at equal rates
combustion reactions
2C4H10 + 13O2 ----> 8CO2 + 10H2O