C2.3 HOW MUCH? 0.0 / 5 ? ChemistryCalculations, moles and yieldC2GCSEAQA Created by: 12dalelCreated on: 22-11-16 16:09 What is an isotope? Atoms of the same atom with a different number of neutrons 1 of 7 What is the relative mass of a neutron or proton? 1 2 of 7 Whats the relative mass of an electron? Very small 3 of 7 What is a mole of a substance? One mole of any substance is it's relative formula mass in grams 4 of 7 How do you work out the relative formula mass of a substance? By adding up all the individual's relative masses in the proportions given 5 of 7 How do you work out the percentage of an element in a compound? Mass of individual element / total mass of compound x 100 = % 6 of 7 What do balanced symbol equations tell us about chemical reactions? How many moles of substances are involed 7 of 7
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