AMOUNT OF SUBSTANCE

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  • Created by: samsh
  • Created on: 01-06-16 14:44
Definition of Relative Atomic Mass (Ar)
Average mass of an atom of an element / 1/12th mass of an atom of 12C
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Relative molecular mass (Mr)
Average mass of a molecule /1/12th mass of an atom of 12C
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how do you find out the no. of particales?
Number of moles X Avogardros constant
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how do you work out moles (with mass)
Mass / Mr (Ar)
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what does the term excess mean?
If one reactant is in excess, then the other will react completely and be used up
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What does the term limiting reagent mean?
the opposite of excess, all the limiting reagent is used up in a reaction and the reaction stops.
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How do you work out moles (with solutions)
Concentration X Volume
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What is the ideal gas equation?
Pv=nRT
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how do you work out % atom economy?
(Mass of desired product / total mass of reactants) X100
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how do you work out percentage yield?
(Actual mass of product/Theoretical mas of product) X100
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Other cards in this set

Card 2

Front

Relative molecular mass (Mr)

Back

Average mass of a molecule /1/12th mass of an atom of 12C

Card 3

Front

how do you find out the no. of particales?

Back

Preview of the front of card 3

Card 4

Front

how do you work out moles (with mass)

Back

Preview of the front of card 4

Card 5

Front

what does the term excess mean?

Back

Preview of the front of card 5
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