The Mole 0.0 / 5 ? ChemistryMolesASAll boards Created by: bio1423Created on: 05-11-13 19:20 Mole formula Mole = mass over Ar 1 of 9 A mole is one mole of an element contains 6x10to the 23 atoms and has a mass in grams equal to the relative atomic mass 2 of 9 Empirical formula is The simplist/ smallest whole number ratio of the atoms of each element in a compound 3 of 9 Molecular formula is the actual number of atoms of each element in a compound 4 of 9 To work out Empirical formula Element I mass/g I Ar I mol=mass/Ar I divide by smallest mole 5 of 9 Working out Molecular formula Mr molecule over emprical formula, or Mr/EF 6 of 9 Water of crystallisation mass of water = mass of hydrated compound - mass anhydrous coompound 7 of 9 Working out number of waters in hydrous compounds Substance (compound, anhydrous form) I mass/g I Mr I mol=mass/Mr I divide by smallest mol 8 of 9 Working out reacting masses 1. Mole = mass/Mr 9 of 9
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