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11 Cards in this Set

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Diatomic Elements
elements that, in there elemental state, exist in nature as pairs of bonded atoms.
mole
the number of particles equal to the number of atoms in exactly 12g of Carbon 12
Avagadro's Number
a) Its the number of particles in a mole

b) its 6.02x10^23
Atomic Mass
the wighted average atomic mass of all naturally occuring atoms of an element (includes isotopes and their abundances)
Gram atomic mass
the mass in grams of one mole of atoms in an element
molecular mass
the sum of all the atomic masses of all the atoms in a molecule
gram molecular mass
the mass in grams of one mole of molecules
formula mass
the sum of the atomic masses of all of the atoms in a formula unit
gram formula mass
the mass in grams of one mole of formula units in a compound
Molar Gas Volume
one mole of any gas at STP has a volume of 22.4L
Empirical Formula Problems
a)40.2%K, 26.9%Cr, 32.9%O

b)21.8%Mg, 27.9%P, 50.3%O
a)


b)