mole concept Flashcards
1
Q
number of moles (solids)
A
mass in g/ molar mass
2
Q
number of moles (liquids)
A
volume/ 1000 x molarity
3
Q
number of moles (gas)
A
volume/ 24 dm3
4
Q
composition (mass)
A
Ar of substance/ Mr of compound x mass
5
Q
composition (percentage)
A
Ar of substance/ Mr of compound x 100%
6
Q
percentage yield
A
actual mass/ theoretical mass x 100%
7
Q
percentage purity
A
pure substance/ impure substance x 100%
8
Q
concentration (mol/dm3)
A
concentration (g/dm3) / Mr
shortcut: M1V1/ M2V2 - finding molarity/ volume of a solution when 3 out of 4 data is given
9
Q
dilution
A
M1V1 = M2V2
