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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)