Quantitative Chemistry 0.0 / 5 ? ChemistryCalculations, moles and yieldGCSEEdexcel Created by: faithperCreated on: 30-11-17 18:08 A mole is _____ of any particle (atoms, ions etc) 6.02x10^23 (known as Avagadro's constant.) 1 of 9 How can you calculate the amount of moles? Mass (of an element or a compound) / Mr (relative formula mass) 2 of 9 How can you calculate the concentration? Mass / Volume (dm^3) (Always check for conversions) 3 of 9 How can you calculate the relative formula mass? Add all the mass numbers of the atoms involved 4 of 9 How can you find the empirical formula? Work out the number of moles, Then divide both numbers by the smallest amount of moles. Leave this in the form of a ratio. 5 of 9 What is a concordant result? When two results are within 0.1 of each other. 6 of 9 How can you calculate the percentage yield? actual yield/theoretical yield x 100 7 of 9 Why would a reaction not give a 100% yield? - Incomplete Reactions - Unwanted by-products produced - Losses during the practical 8 of 9 How can you calculate Atom Economy? Total Mr of desired product / Total Mr of all products x 100 9 of 9
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