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Concentration
A measurement of how much solute exists within a certain volume of solvent
What is concentration measured in?
g/dm³ or mol/dm³
1cm³ in dm³ =
0.001dm³
concentration (g/dm³) =
(mass of solute) ÷ (volume of solution)
concentration (mol/dm³) =
(moles of substance) ÷ (volume of solution)
The volume of 1 mole of any gas (at room temperature and pressure) is:
24dm³
24dm³ is known as the:
molar gas volume
number of moles of gas =
(volume of gas (dm³)) ÷ (24dm³)
Relative atomic mass
The weighted mean mass of an atom (including isotopes) of an element compared with 1/12 of the mass of an atom of carbon-12.
Symbol for relative atomic mass:
Aᵣ
Relative formula mass
The sum of the relative atomic masses of the elements as given in the formula for any non-molecular compound.
Symbol for relative formula mass:
Mᵣ
Avogadro's constant
6.02 × 10²³
What is one mole of any substance?
the amount of that substance that contains 6.02 x 10²³ particles
The mass (in g) of one mole of any substance will be the same as...
the substance's relative/formula mass
number of moles =
Mass in g / Mr
Note 
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