Cambridge international AS and a level chemistry coursebook 2nd edition

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... carbon-12 has a mass of exactly 12 units Relative molecular mass, relative isotopic mass and relative formula mass are also 12 based on the C scale The type and relative amount of each isotope in an... empirical formula and molecular formula – the mole in terms of the Avogadro constant analyse and use mass spectra to calculate the relative atomic mass of an element calculate empirical and molecular... 19 Cambridge International AS Level Chemistry summary ■ ■ ■ ■ ■ ■ Relative atomic mass is the weighted average mass of naturally occurring atoms of an element on a scale where an atom of carbon-12
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