CH1 Section 3 defintions 0.0 / 5 ? ChemistryCalculationsASWJEC Created by: Tasha.LCreated on: 20-04-16 21:38 Relative Atomic Mass The weighted average mass of all the atoms in a normal isotopic sample of an element on a scale where one atom of carbon 12 has a mass of 12g exactly. 1 of 6 Relative Isotopic Mass The mass of an atom of a particular isotope on the scale where one atom of carbon 12 has a mass of 12g exactly. 2 of 6 Relative Formula Mass The average mass of a molecule, on a scale where one atom of carbon 12 has a mass of 12g exactly. 3 of 6 Relative Molecular Mass The ratio of the average mass of one molecule of an element or compound, on a scale where one atom of carbon 12 has a mass of 12g exactly. 4 of 6 The Mole The number of atoms equal to the number of particles in 12g of carbon 12. 5 of 6 Atom Economy The percentage by mass all the reactants that ended up in the desired product. 6 of 6
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