Chemistry: The Central Science (13th Edition)
13th Edition
ISBN: 9780321910417
Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 12, Problem 117IE
The karat scale used to describe gold alloys is based on mass percentages. (a) If an alloy is formed that is 50 mol% silver and 50 mol% gold, what is the karat number of the alloy? Use Figure 12.18 to estimate the color of this alloy. (b) If an alloy is formed that is 50 mol% copper and 50 mol% gold, what is he karat number of the alloy? What is the color of this alloy?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
An alloy structure (element: Co, Y, Si) adopts the cubic crystal structure with lattice constant a = 5.19 Å. Please determine (1) the bond length between Co-Y, Co-Si, Y-Si. (2) the density of the alloy. (Hint: atomic weight for Co: 58.9 g/mol; Y: 88.9 g/mol; Si: 28 g/mol; Avogadro constant: NA = 6.022 ×10²³ mol-1).
Define the term Interstitial alloys?
Determine the empirical formula for the following compound. Use the notation W, Yy. Assume that W is a cation and Y is an anion. Determine the coordination number for the yellow spheres (i.e., how many white ions each yellow ion is adjacent to). Determine the coordination number for the white spheres (smaller spheres like those on the corners). Empirical Formula W6Y8 Coordination number for yellow spheres 6 Coordination number for white spheres 8
Chapter 12 Solutions
Chemistry: The Central Science (13th Edition)
Ch. 12.3 - The following diagram shows the combination...Ch. 12.3 -
3.3 The following diagram represents the...Ch. 12.5 -
3.4 The following diagram represents the...Ch. 12.5 - Glycine, an amino acid used by organisms to make...Ch. 12.7 - The following diagram represents a...Ch. 12.7 -
3.7 Nitrogen (N2) and hydrogen (H2) react to form...Ch. 12.7 -
3.8 Nitrogen monoxide and oxygen react to form...Ch. 12.7 - Write "true" or "false" for each statement. a. We...Ch. 12 - Determine the empirical and molecular formulas of...Ch. 12 - a. Combustion analysis of toluene, a common...
Ch. 12 -
3.67 Automotive air bags infilate when sodium...Ch. 12 - Prob. 3ECh. 12 - Prob. 4ECh. 12 -
12.5 Which of these molecular fragments would...Ch. 12 - Prob. 6ECh. 12 - Prob. 7ECh. 12 - Prob. 8ECh. 12 - Prob. 9ECh. 12 - Prob. 10ECh. 12 - Prob. 11ECh. 12 - Prob. 12ECh. 12 - 12.13 Indicate the type of solid (molecular,...Ch. 12 - Prob. 14ECh. 12 -
12.15 A white substance melts with some...Ch. 12 -
12.16 You are given a white substance that...Ch. 12 - Prob. 17ECh. 12 - Prob. 18ECh. 12 - Prob. 19ECh. 12 - Prob. 20ECh. 12 - Prob. 21ECh. 12 - Prob. 22ECh. 12 - Prob. 23ECh. 12 - Prob. 24ECh. 12 - Prob. 25ECh. 12 - Prob. 26ECh. 12 - Prob. 27ECh. 12 - Prob. 28ECh. 12 - Prob. 29ECh. 12 - Prob. 30ECh. 12 - Prob. 31ECh. 12 - Prob. 32ECh. 12 - Prob. 33ECh. 12 - Prob. 34ECh. 12 - Prob. 35ECh. 12 - Prob. 36ECh. 12 - Prob. 37ECh. 12 - Prob. 38ECh. 12 - Prob. 39ECh. 12 - Prob. 40ECh. 12 - Prob. 41ECh. 12 - Prob. 42ECh. 12 - Prob. 43ECh. 12 - Prob. 44ECh. 12 - Prob. 45ECh. 12 - Prob. 46ECh. 12 - Prob. 47ECh. 12 - Prob. 48ECh. 12 -
12.49 Which would you expect to be the more...Ch. 12 - Prob. 50ECh. 12 - Prob. 51ECh. 12 - Prob. 52ECh. 12 - Prob. 53ECh. 12 - Prob. 54ECh. 12 - Prob. 55ECh. 12 - Clausthalite is a mineral composed of lead...Ch. 12 - Prob. 57ECh. 12 - Prob. 58ECh. 12 - Prob. 59ECh. 12 - Prob. 60ECh. 12 - Prob. 61ECh. 12 - Prob. 62ECh. 12 - Prob. 63ECh. 12 - Prob. 64ECh. 12 - Prob. 65ECh. 12 - Prob. 66ECh. 12 - Prob. 67ECh. 12 - Prob. 68ECh. 12 - Prob. 69ECh. 12 - Prob. 70ECh. 12 - Prob. 71ECh. 12 - Prob. 72ECh. 12 - Prob. 73ECh. 12 - Prob. 74ECh. 12 - Prob. 75ECh. 12 - Prob. 76ECh. 12 - Prob. 77ECh. 12 - Prob. 78ECh. 12 - Prob. 79ECh. 12 - Prob. 80ECh. 12 - Prob. 81ECh. 12 - Prob. 82ECh. 12 - Prob. 83ECh. 12 - Prob. 84ECh. 12 - Prob. 85ECh. 12 - Prob. 86ECh. 12 - Prob. 87ECh. 12 - Prob. 88ECh. 12 - Prob. 89ECh. 12 - Prob. 90ECh. 12 - Prob. 91ECh. 12 - Prob. 92ECh. 12 - Prob. 93ECh. 12 - Prob. 94ECh. 12 - Prob. 95ECh. 12 - Prob. 96ECh. 12 - Prob. 97ECh. 12 - Prob. 98ECh. 12 - Prob. 99AECh. 12 - Prob. 100AECh. 12 - Prob. 101AECh. 12 - Prob. 102AECh. 12 - Prob. 103AECh. 12 - What type of lattice—primitive cubic body-centered...Ch. 12 - Prob. 105AECh. 12 - Prob. 106AECh. 12 - Prob. 107AECh. 12 - Prob. 108AECh. 12 - Prob. 109AECh. 12 - Prob. 110AECh. 12 - Prob. 111AECh. 12 - Prob. 112AECh. 12 - Prob. 113AECh. 12 - 12.114 Germanium has the same structure as...Ch. 12 - Prob. 115AECh. 12 - Prob. 116AECh. 12 - The karat scale used to describe gold alloys is...Ch. 12 - Prob. 118IECh. 12 - Prob. 119IECh. 12 - Prob. 120IECh. 12 - Prob. 121IECh. 12 - Prob. 122IECh. 12 - Prob. 123IECh. 12 - Prob. 124IECh. 12 - Prob. 125IE
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Are all alloys homogeneous solutions? Explain your answer.arrow_forwardSome oxide superconductors adopt a crystal structure similar to that of perovskite (CaTiO3). The unit cell is cubic with a Ti4+ ion in each corner, a Ca2+ ion in the body center, and O2- ions at the midpoint of each edge. (a) Is this unit cell simple, body-centered, or face-centered? (b) If the unit cell edge length is 3.84 Å, what is the density of perovskite (in g/cm3)?arrow_forwarddo (b) What is the relationship between the length of the face diagonal and the radius, r, of the atoms in the cell? (Enter a mathematical expression.) face diagonal = (c) How is the radius of the atoms related to do? (Enter a mathematical expression.) r = (d) Gold metal crystals have an FCC structure. The unit cell edge in gold is 0.4078 nm long. What is the radius (in nm) of a gold atom? nmarrow_forward
- (a) Pure iron has a change in crystal structure from BCC to FCC when heating up above 912°C. If the atomic radius of an Fe atom is 0.124 nm, calculate the volumes of the FCC and BCC unit cells. (b)Recall that there are two atoms per BCC unit cell, and four atoms per FCC unit cell. With this information in mind, calculate the percent change in volume of a sample of pure Fe as it transforms from an FCC to a BCC structure upon cooling below 912°C. Specify if this percent change manifests as an increase or decrease in volume of the sample.arrow_forward<p>Describe why bronze was one of the first alloys that humans used.arrow_forwardCalculate the atomic packing factor for diamond (refer to Fig. 15C.15); assume that the atoms touch along the body diagonal.arrow_forward
- Needs Complete typed solution with 100 % accuracy.arrow_forwardplease solveee 1. Tantalum is rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. It has a density of 16.4 kg/L and a molecular weight of 180.948 g/mol. What is the (A) atomic radius in cm, (B) volume in cm^3 of Ta if it adopts the body centered cubic unit structure and (C) volume of unit cellarrow_forwardWhat is the answerarrow_forward
- How do atomic radius ratios relate to strength in alloys?arrow_forwardA hypothetical metal has a tetragonal unit cell for which the lattice parameters (in nm) are a=b=0.550, c=0.673 and all angles are 90 degrees. If there are 5 atoms per unit cell and the atomic packing factor is 0.63, determine the atomic radius in nm. Use 3.14 for pi. Give your answer to 3 decimal places. I got 0.197 the first time and it was incorrect.arrow_forwardPLEASE double and triple check your answers and help me with all the parts. There are three partsarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage Learning
Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning
Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage Learning
ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
Principles of Modern Chemistry
Chemistry
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:Cengage Learning
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Chemistry for Engineering Students
Chemistry
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Cengage Learning
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Unit Cell Chemistry Simple Cubic, Body Centered Cubic, Face Centered Cubic Crystal Lattice Structu; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=HCWwRh5CXYU;License: Standard YouTube License, CC-BY