Question: A student is given a crucible and asked to prove whether it is made of pure platinum. She first weighs the crucible in air and

A student is given a crucible and asked to prove whether it is made of pure platinum. She first weighs the crucible in air and then weighs it suspended in water (density = 0.9986 g/mL). The readings are 860.2 g and 820.2 g, respectively. Based on these measurements and given that the density of platinum is 21.45 g/cm3, what should her conclusion be?

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