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OpenStudy (anonymous):
Density measurements can be used to analyze mixtures. For example, the density of solid sand (without air spaces) is about 2.84 g/mL. The density of gold is 19.3 g/mL. If a 1.00 kg sample of sand containing some gold has a density of 3.10 g/mL (without air spaces), what is the percentage of gold in the sample?
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OpenStudy (anonymous):
3.10 = p (19.3) + (1-p) (2.84) solve for p
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