Gold is alloyed with other metals to increase its hardness in making jewelry. You have a piece of jewelry containing only gold and silver, which have pure densities of 19.3 g/cm³ and 10.5 g/cm³ respectively. You measure the piece of jewelry's volume to be 1.25 cm³ and its mass to be 20.5 g. Assuming the total volume of the jewelry is the sum of the volumes of the gold and silver it contains, what is the mass percent of gold in the piece?

Gold is alloyed with other metals to increase its hardness in making jewelry. You have a piece of jewelry containing only gold and silver, which have pure densities of 19.3 g/cm³ and 10.5 g/cm³ respectively. You measure the piece of jewelry's volume to be 1.25 cm³ and its mass to be 20.5 g. Assuming the total volume of the jewelry is the sum of the volumes of the gold and silver it contains, what is the mass percent of gold in the piece?

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter1: Essential Ideas

Section: Chapter Questions

Problem 9E: What properties distinguish solids from liquids? Liquids from gases? Solids from gases?

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Question

100%

Gold is alloyed with other metals to
increase its hardness in making jewelry.
You have a piece of jewelry containing
only gold and silver, which have pure
densities of 19.3 g/cm³ and 10.5 g/cm³
respectively. You measure the piece of
jewelry's volume to be 1.25 cm³ and its
mass to be 20.5 g. Assuming the total
volume of the jewelry is the sum of the
volumes of the gold and silver it contains,
what is the mass percent of gold in the
piece?

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