Chemistry 3.0 / 5 based on 1 rating ? ChemistryCalculations, moles and yieldGCSEEdexcel Created by: ethanhooper78Created on: 13-02-18 11:35 relative atomic mass relative atomic mass = (% isotope1 / 100) + (% isotope2 / 100 1 of 10 relative formula mass relative formula mass = sum of atomic masses of all elements in molecule / compound 2 of 10 concentration concentration = mass / volume 3 of 10 moles moles = mass / relative formula mass 4 of 10 number of particles number of particles = moles x (6.02 x 10²³) 5 of 10 Rf value (retention factor) Rf value = distance travelled by dye / distance travelled by solvent 6 of 10 concentration (2) concentration = moles / volume 7 of 10 percentage yield (%) percentage yield = (actual yield / theoretical yield) x 100 8 of 10 atom economy atom economy = (relative formula mass useful product / Sum of relative formula masses of all reactants) x 100 9 of 10 energy change energy change = Ʃ average bond energy of bonds broken - Ʃ average bond energy of bonds made 10 of 10
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