Learn all about calculations involving masses with this presentation! Includes mass, moles, concentration, atom economy, percentage yield and Avogadro's constant. Includes some practise questions to test your learning!
Using relative atomic mass/moles you can calculate:
Number of moles in a given mass of that substance and vice versa.
Masses of products/reactants from balanced symbol equations or balance equations from give
Percentage by mass from the relative formula mass and the relative atomic masses.
Explain how the concentration of a solution in mol/dm3 is related to the mass of the solute and
volume of the solution.
Using masses from reactions:
Calculate the percentage yield of a product from the actual yield of a reaction.
Calculate the theoretical mass of a product from a given mass of reactant and the balanced eq
the reaction.
Calculate the atom economy of a reaction to form a desired product from the balanced equati
, AIMS
Using gases/moles/volumes:
Understand Avogadro’s constant.
Calculate the volume of a gas at room temperature and pressure from its mass and relative for
mass.
Calculate volumes of gaseous reactants and products from a balanced equation and a given v
gaseous reactant or product.
Enthalpy changes:
Calculation energy changes from given bond enthalpies.
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