Moles

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Chemistry

Chemistry - AQA

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13 Terms

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Mole
Avogadro's number of an atom, ion or compound
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Formula for moles
Mass/relative formula mass (Mr)
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The mass of 1 mole of any substance=
formula mass in grams
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mol
Symbol for moles
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Value of Avogadro constant
6.02 x 10^23
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Avogadro's constant
The number of atoms, molecules or ions in a mole of a given substance
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Relative atomic mass
The weighted mean mass of an atom of an element compared with one
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Relative formula mass
The relative atomic masses of the elements in a compound added together
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Reacting mass
The amount of one reactant needed to react exactly with another reactant.
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Link between moles and equations
Multipliers show you the ratio of moles in a reaction
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Reagent
Reactant
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Limiting reactant (limiting reagent)
A reactant that is totally used up so it determines the amount of product formed.
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Excess
More than is required to react with the limiting reactant