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Amount of substance, formulae and reacting masses

Physical foundations · Lesson 1 of 5

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Lesson 1 of 5 · Physical foundations

Amount of substance, formulae and reacting masses

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Define and use the terms relative atomic mass, relative isotopic mass, relative molecular mass and relative formula mass on the carbon-12 scale.
Calculate amount of substance in moles from mass, gaseous volume, number of particles and concentration-volume data using $n=\frac{m}{M_r}$, $n=\frac{V}{V_m}$, $n=\frac{N}{L}$ and $n=cV$ with consistent units.

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Construct and interpret balanced symbol and ionic equations, including state symbols where required, and use stoichiometric coefficients to calculate reacting masses and amounts of products and reactants.

Calculate concentrations in $\text{mol dm}^{-3}$ and $\text{g dm}^{-3}$, perform solution-dilution calculations, and apply these to titration and preparation contexts within the scope of this unit.

Calculate percentage yield, atom economy and the masses of desired products and waste materials, and explain their relevance to efficient chemical processes.

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