In a sample of 18 karat gold, 75 percent of the total mass is pure gold, while the rest is typically 16 percent silver and 9 percent copper If the density of pure gold is gold 19 3g cm3, while the densities of silver and copper are respectively silver 10 5g cm3 and copper 8 90g cm3, what is the ove...

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In a sample of 18-karat gold, 75 percent of the total mass is pure gold, while the

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In a sample of 18-karat gold, 75 percent of the total mass is pure gold, while the rest is typically 16 percent silver and 9 percent copper. If the density of pure gold is ρgold=19.3g/cm3, while the densities of silver and copper are respectively ρsilver=10.5g/cm3 and ρcopper=8.90g/cm3, what is the overall density ρ18kt of this alloy of 18-karat gold?