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What is the density of 18.0-karat gold that is a mixture

ISBN: 9780130606204 3

Solution for problem 9PE Chapter 11

Physics: Principles with Applications | 6th Edition

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Problem 9PE

What is the density of 18.0-karat gold that is a mixture of 18 parts gold, 5 parts silver, and 1 part copper? (These values are parts by mass, not volume.) Assume that this is a simple mixture having an average density equal to the weighted densities of its constituents.

Step-by-Step Solution:

Step-by-step solution Step 1 of 9 If total mass of a mixture is divided by total volume; it gives the value of average density of the mixture. Step 2 of 9 Density of a substance is mass of that substance per unit volume of the substance. Therefore, …… (1) Here, is density, is mass and, is volume. Step 3 of 9 From equation (1), volume of 18 g gold is, Step 4 of 9 Substitute for and for . Step 5 of 9 From equation (1), volume of 5g sliver is, Substitute for and for .

Step 6 of 9

Step 7 of 9

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