CAIE A Level Chemistry 9701 · Atoms, molecules and stoichiometry
A student makes the following statement:
'One mole of carbon-12 atoms has a mass of 12 g and contains atoms. One mole of oxygen-16 atoms has a mass of 16 g, so it must contain more atoms than one mole of carbon-12.'
Describe what is meant by the term 'mole' in terms of the Avogadro constant, and use this definition to evaluate the student's statement.
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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