development of fuels 2.0 / 5 based on 1 rating ? ChemistryGreen ChemistryASEdexcel Created by: Amber chapmanCreated on: 14-11-12 19:36 What does Ar stand for? Relative Atomic Mass, the link between mass of an element and number of atoms it contains 1 of 6 What does Mr mean? Relative Formula Mass, when the relative atomic mass for each element is added to get total mass 2 of 6 What is a chemical "mole"? The unit that measures the amount of substance in such a way that equal amounts of elements consist of equal numbers of atoms 3 of 6 What is Avogadros constant and give its value 6.022x10.23, The number of formula units in one mole of any substance is a constant 4 of 6 What is the emperical formula of a substance? Tells you the simplest ratio of the numbers of different types of atoms in the substance 5 of 6 What is the molecular formula? Tells you the actual number of different types of atoms 6 of 6
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