3173988
Moles
- Relative Atomic Mass(Ar)
- Average mass of
one atom of an
element/one twelve
of mass of an atom
of carbon-12 atom
- Average mass of
one atom of an
element/one twelve
of mass of an atom
of carbon-12 atom
- Relative
molecular
mass(Mr)
- Mass of one molecule
of an element or
compound/one twelve
of an atom of
carbon-12 atom
- Mass of one molecule
of an element or
compound/one twelve
of an atom of
carbon-12 atom
- Percentage
composition
of an element
- [(atoms of
element) x
Ar]/Mr x 100%
- [(atoms of
element) x
Ar]/Mr x 100%
- 1 mole of
anything=6 x
10^23
- Molar mass
- No.of
atoms=Mr/Mass of
one atom
- No.of
atoms=Mr/Mass of
one atom
- Empirical
Formula
- 1)Write
mass/percentage.2)Find
the number of
moles(divide by
Ar).3)Divide by smallest
no.4)Find molar ratio
- 1)Write
mass/percentage.2)Find
the number of
moles(divide by
Ar).3)Divide by smallest
no.4)Find molar ratio
- Molecular
Formula
- n=molecular
formula/empirical
formula
- n=molecular
formula/empirical
formula
- No. of moles
of gas:vol of
gas in
dm3/24dm3
- 24dm3=24000cm3
- concentration
of a solution
- Mass of
solute=concentration(g/dm3)
x Vol.(dm3)
- No. of moles of
solute:Concentration(mol/dm3) x
Vol.(dm3)
- Mass of
solute=concentration(g/dm3)
x Vol.(dm3)
- Mass=Moles x Ar
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