Pyrite is a mineral having the formula FeS₂ and a density of 5.01 g/mL. It looks like gold and is often called fool’s gold as it is sometimes found in association with gold in gold deposits. Any object sinks in a liquid if the object is denser than the liquid, and it floats if the object is less dense than the liquid. Using Table 2.4, how could you separate gold from fool’s gold?

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Table 2.4 Densities of Some Common Substances* Substance Density (g/mL) Substance 19.3 13.6 11.4 Gold (solid) Mercury (liquid) Lead (solid) Water (liquid) Water (solid ice at 0 °C) 0.997 0.917 Butter (solid) Gasoline (liquid) Oxygen (gas) Air (gas) Helium (gas) Density (g/mL) 0.9 0.7 0.001 43 0.001 30 0.000 18 *Densities of all liquids and solids except ice measured at 25 °C; densities of gases measured at 0 °C and 1 atm pressure.