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11 Cards in this Set

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The SI base unit used to measure the amount of a substance whose number of particles is the same as the number of atoms of carbon in excatly 12 grams of carbon 12
Avogadro's Number
6.022 X 10, the number of atoms or molecules in 1.000 mol
Molar Mass
The mass in grams of one mole of a substance
Average Atomic Mass
the weighted average of the masses of all naturally occurring isotopes of an element.
Percentage Compsition
The percentage by mass of each element in a compound
Empirical Formula
a chemical formula that shows the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio.
Molecular Formula
a chemical formula that shows the number and kinds of atoms in a molecule, but not the arrangement of the atoms.
The proportional relationship between two or more substances during a chemical reaction
Limiting Reactant
The substance that controls the quantity of product that can form in a chemical reaction.
Excess Reactant
The substance that is not used up completely in a reaction
Actual Yield
The measured amount of a product of a reaction.