Red gold is a gold‑copper alloy used to make jewelry. A piece of jewelry made of red gold weighs 8.85 g8.85 g and has a volume of 0.545 cm30.545 cm3. Gold has a density of 19.3 g/cm319.3 g/cm3 and copper has a density of 8.96 g/cm38.96 g/cm3. Calculate the percentage by mass of each metal in the jewelry. Assume the total volume of the jewelry is the sum of the volumes of the two metals it contains.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter1: The Nature Of Chemistry
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Red gold is a gold‑copper alloy used to make jewelry. A piece of jewelry made of red gold weighs 8.85 g8.85 g and has a volume of 0.545 cm30.545 cm3. Gold has a density of 19.3 g/cm319.3 g/cm3 and copper has a density of 8.96 g/cm38.96 g/cm3. Calculate the percentage by mass of each metal in the jewelry. Assume the total volume of the jewelry is the sum of the volumes of the two metals it contains.

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