None Red gold is a gold-copper alloy used to make jewelry. A piece of jewelry made of red gold weighs 8.68 g and has a volume of0.514 cm³. Gold has a density of 19.3 g/cm³ and copper has a density of 8.96 g/cm³. Calculate the percentage by mass of eachmetal in the jewelry. Assume the total volume of the jewelry is the sum of the volumes of the two metals it contains.gold:copper:Pure gold is defined as having 24 carats. When mixed in an alloy, the carats of gold are given as a percentage of this value. Forexample, a piece of jewelry made with 50% gold has 12 carats. State the purity of this piece of red gold jewelry in carats.purity:carats%%

Given Data:Total mass of red gold (M): 8.68 gTotal volume of red gold (V): 0.514 cm³Density of gold…

Answered: Red gold is a gold-copper alloy used to…

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

Section: Chapter Questions

Problem 127QRT

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Similar questions

A 15.5 g sample of sodium carbonate is added to a solution of acetic acid weighing 19.7 g. The two substances react, releasing carbon dioxide gas to the atmosphere. After reaction, the contents of the reaction vessel weigh 28.7 g. What is the mass of carbon dioxide given off during the reaction?
Gold leaf, which is used for many decorative purposes, is made by hammering pure gold into very thin sheets. Assuming that a sheet of gold leaf is 1.27 105 cm thick, how many square feet of gold leaf could be obtained from 28.35 g gold? The density of gold is 19.3 g/cm3.
1.87 A solution of ethanol in water has a volume of 54.2 mL and a mass of 49.6 g. what information would you need to look up and how would you determine the percentage of ethanol in this solution?
When 12.6 g calcium carbonate (the principal component of chalk) is treated with 63.0 mL hydrochloric acid (muriatic acid sold in hardware stores; density = 1.096 g/mL), the calcium carbonate reacts with the acid, goes into solution, and carbon dioxide gas bubbles out of the solution. After all of the carbon dioxide has escaped, the solution weighs 76.1 g. Calculate the volume (in liters) of carbon dioxide gas that was produced. (The density of the carbon dioxide gas is 1.798 g/L.)
Ethylene glycol, C2H6O2, is an ingredient of automobile antifreeze. Its density is 1.11 g/cm3 at 20 C. If you need 500. mL of this liquid, what mass of the compound, in grams, is required?
On October 21, 1982, the Bureau of the Mint changed the composition of pennies (see Exercise 120). Instead of an alloy of 95% Cu and 5% Zn by mass, a core of 99.2% Zn and 0.8% Cu with a thin shell of copper was adopted. The overall composition of the new penny was 97.6% Zn and 2.4% Cu by mass. Does this account for the difference in mass among die pennies in Exercise 120? Assume the volume of the individual metals that make up each penny can be added together to give the overall volume of the penny, and assume each penny is the same size. (Density of Cu = 8.96 g/cm3; density of Zn = 7.14 g/cm3).
A copy of your chemistry textbook is found to have a mass of 2.60 x103 grams. What is the mass of this copy of your chemistry textbook in ounces?
A person weighed 15 pennies on a balance and recorded the following masses: 3.112 g 3.109 g 3.059 g 2.467 g 3.079 g 2.518 g 3.129 g 2.545 g 3.050 g 3.053 g 3.054 g 3.072 g 3.081 g 3.131 g 3.064 g Curious about the results, he looked at the dates on each penny. Two of the light pennies were minted in 1983 and one in 1982. The dates on the 12 heavier pennies ranged from 1970 to 1982. Two of the 12 heavier pennies were minted in 1982. a. Do you think the Bureau of the Mint changed the way it made pennies? Explain. b. The person calculated the average mass of the 12 heavy pennies. He expressed this average as 3.0828 g 0.0482 g. What is wrong with the numbers in this result, and how should the value be expressed?
You receive a mixture of table salt and sand and have to separate the mixture into pure substances. Explain how you would carry out this task. Is your method based on physical or chemical properties? Explain.
A 124-g sample of a pure liquid, liquid A, with a density of 3.00 g/mL is mixed with a 40.8-mL sample of a pure liquid, liquid B, with a density of 2.00 g/mL. What is the total volume of the mixture? (Assume there is no reaction upon the mixing of A and B, and volumes are additive.)
What properties distinguish solids from liquids? Liquids from gases? Solids from gases?
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