Chemistry Equations Flashcards
1
Q
Avogadro’s constant
A
6.022 x 10 ^23
2
Q
Moles
A
Mass / relative atomic mass
3
Q
Concentration - g dm ^3
A
Mass / volume
4
Q
Concentration - mol dm ^3
A
Moles / Volume
Or
Concentration x volume
5
Q
Gas volume
A
Moles x 24
24 - 1 mole of any gas has a volume of 24dm ^3 at room temperature and pressure
6
Q
Percentage yield
A
Actual product made / theoretical product made
x 100
7
Q
Atom economy
A
Relative formula mass / maximum theoretical mass
x 100
8
Q
Energy changes
A
Total energy needed to break bonds in reactants - total energy released when bonds in the products are formed
9
Q
Rate of reaction
A
Quantity of reactant used / time taken
Or
Quantity of product formed / time taken
10
Q
Rf value
A
Distance moved by substance / distance moved by solvent
