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The purity of gold alloys is expressed in karats, which is the massfraction of gold multiplied by 24. Pure gold is 24 kt, whereas 16kt gold jewelry typically contains 66.666667% gold, 16.666667%silver and 16.666667% copper (by mass). Estimate the density ofthis 16 kt gold alloy.
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Keith LeannonLv2

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For the following questions, You must show your equations and calculations to get credit!

substance density/ g cm^-3
--------------------------------------------------
helium gas 0.000 16
dry air 0.001 185
gasoline 0.66 ---> 0.69 v
kerosene 0.82
benene 0.880
water 1.000
carbon tetrachloride 1.595
magnesium 1.74
salt 2.16
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iron 7.87
copper 8.96
silver 10.5
lead 11.34
uranium 19.05
gold 19.32 B?
-------------------------------------------------

The following data was observed in the lab:

Mass Vol

Sample A 100 g 62.7 mL

Sample b 100 g 113.6 mL

A. Based on the data table of densities to the right, what most likely is Sample A? What most likely is Sample B? Show your calculations!

B. Will Sample A float in water? Why?

C. Will Sample B float in water? Why.

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Express your answer using two significant figures.

2/ How many Cu atoms are present in a piece of sterlingsilver jewelry weighing 33.74 g ? (Sterling silver is a silverâcopper alloy containing 92.5% Ag by mass.)

Express your answer using two significant figures.

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The purity of gold alloys is expressed in karats, which is the massfraction of gold multiplied by 24. Pure gold is 24 kt, whereas 16kt gold jewelry typically contains 66.666667% gold, 16.666667%silver and 16.666667% copper (by mass). Estimate the density ofthis 16 kt gold alloy.
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The purity of gold alloys is expressed in karats, which is the massfraction of gold multiplied by 24. Pure gold is 24 kt, whereas 16kt gold jewelry typically contains 66.666667% gold, 16.666667%silver and 16.666667% copper (by mass). Estimate the density ofthis 16 kt gold alloy.___________________

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Related textbook solutions

Basic Chemistry

Principles of Chemistry Molecular Approach

Chemistry: Structure and Properties

Principles of Chemistry Molecular Approach

Chemistry: A Molecular Approach

Chemistry: A Molecular Approach

Principles of Chemistry: A Molecular Approach

Chemistry: The Central Science

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Weekly leaderboard

The purity of gold alloys is expressed in karats, which is the massfraction of gold multiplied by 24. Pure gold is 24 kt, whereas 16kt gold jewelry typically contains 66.666667% gold, 16.666667%silver and 16.666667% copper (by mass). Estimate the density ofthis 16 kt gold alloy.
___________________