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Amount of Substance
Description
Chemistry (Amount of Substance) Mind Map on Amount of Substance, created by Beth Ritchie on 13/11/2013.
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amount of substance
chemistry
chemistry
amount of substance
Mind Map by
Beth Ritchie
, updated more than 1 year ago
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Created by
Beth Ritchie
almost 11 years ago
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Resource summary
Amount of Substance
Relative masses
Relative atomic mass
The average mass of one atom of an element/1/12th the mass of an atom of C12
Relative molecular mass
Average mass of one molecule/1/12th the mass of an atom of C12
Relative formula mass
(For Ionic compounds) Average mass of one ionic compund/1/12 the mass of C12
Avogadro's constant
The number of atoms in 1g of hydrogen is 6.022 x 10^23
Definition: The number of atoms in 12g of carbon 12.
The mole contains this number of particles
Number of moles
n = m/Mr
n = c x v
n = vol x 24
n = PV/Rt
Formula
Empirical Formula
1) Atoms 2) Mass 3) Moles 4) Ratio 5) Formula
Molecular Formula
Divide actual Mr by the Mr of the empirical formula
Ionic Equations
Get rid of spectator ions
Balencing equations
Fractions can be used for gasses, make sure numbers add up on both sides
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