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21 Cards in this Set

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Density
Mass per unit volume. kg/m3 or g/cm3 or g/mL
Mass
measure of the quantity of matter in a body
Weight
measure of the gravitational attraction for a body
Accuracy
how closely measured values agree with the correct value
Precision
how closely individual measurements agree with each other
Specific gravity
how dense your substance is relative to water.
MP water Fahrenheit
32 F
MP water Celsius
0.0 C
MP water Kelvin
273 K
BP water Fahrenheit
212 F
BP water Celsius
100 C
BP water Kelvin
373 K
kelvin and centigrade relationship
k= c+ 273
farenhieght and centigrade relationship
f= (1.8)C+32
or
C= (f-32)/1.8
if SG > 1 or w/e meduim is
substance will sink
if SG < 1 or w/e medium is
substance will float!!
A mole
atoms, ions, or molecules; a number of things; One mole = 6.022 x 1023 things
Avogadro’s number
6.022 x 1023
Symbol for Avogadro’s number is NA.
Molar mass
mass in grams numerically equal to the atomic weight of the element in grams.
Empirical Formula
smallest whole-number ratio of atoms present in a compound. Determined from the percent composition of the compound.
which is determined experimentally
Molecular Formula
actual numbers of atoms of each element present in a molecule of the compound
Ethene – C2H4
Pentene – C5H10.
Determined from the percent composition of the compound.
which is determined experimentally