⋆˙⟡ chemistry formulae
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13 Terms
moles (from mass) !
mass (g) ÷ molar mass (g/mol)
moles (from concentration/volume) !
concentration (mol/dm³) x volume (dm³)
moles of gas at room temp/pressure !
volume (dm³) = moles x 24
concentration !
mass of solute (g) ÷ volume of solvent (dm³)
percentage yield !
(actual yield ÷ theoretical yield) x 100
atom economy !
(mass of desired product ÷ total mass of reactants ) x 100
electrolysis !
charge (C) = current (A) x Time (s)
rate of reaction !
amount of reactant used/product formed ÷ time taken
equilibrium constant !
products ÷ reactants
chromatography !
distance moved by substance ÷ distance moved by solvent
energy change in a reaction !
total energy to break bonds in reactants - total energy released from products
Avogardo’s number
6.02×10²³
cm³ to dm³
number x 1000
Note 
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