To investigate the percentage of copper in a sample of malachite.
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... However, the amount of malachite used was considerably lower than most of the other amounts used. It is arguable whether there is sufficient evidence to draw an accurate conclusion due to the considerable range of percentages (range of 27.9%). However, if one considers the fact that the maximum amount that there could be in a sample is 53% (see below; such a sample would not contain any sand), then the average percentage of 30.8% seems reasonable, if not accurate, since the make-up of the malachite samples leant towards there being more san ...
