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Chem Test Ch 6

TermDefinition
average atomic mass the weighted average of the masses of all the isotopes of an element
mole (mol) the number equal to the number of carbon atoms in exactly 12 grams of pure (12)C NUMBER FROM PERIODIC TABLE
1 mol of X 6.02 x 10^23 X
Avogadro's number (def) the number equal to the number of carbon atoms in exactly 12 grams of pure (12)C; the number of atoms in exactly one mol
Avogadro's number 6.02 x 10^23 atoms
mass percent the percent by mass of a component of a mixture or an element in a compound
STP standard temperature and pressure - conditions at which one mole of any gas will occupy 22.4 L of space
molar mass the mass (in grams) of 1 mol of the substance, obtained by summing the masses of each of the component atoms
empirical formula the formula of a compound expressing the smallest whole-number ratio of atoms in a compound - simplest form
molecular formula the actual formula of a compound giving the types of atoms and the numbers of each type of atom
hydrate a compound that contains a definite amount of water in its crystal structure
anhydrous substance containing no water
H2O of hydration water that has been evaporated
1 mol (L) 22.4 L
1 mol (molecules/particles/formula units/atoms) 6.02 x 10^23
Created by: meg.minor.15