Iron pyrite (fool's gold, page 11) has a shiny golden metallic appearance. Crystals are often in the form of perfect cubes. A cube 0.40 cm on each side has a mass of 0.064 g. a.Which of these observations are qualitative and which are quantitative? b.Which of the observations are extensive and which are intensive? c.What is the density of the sample of iron pyrite?

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