Explanation The packing efficiency for a cubic metal is calculated by the formula, P . E = V atoms V cell × 100 % ……(1) Where, P . E is the packing efficiency of unit cell. V atoms is the volume of atoms in the unit cell. V cell is volume area of unit cell. In a body-centered cubic metal there are 8 atoms at 8 corners of the unit cell. Each atom at the corner occupies one eighth of the cell. Also, there is a n atom at the centre of the cell. Thus there are total 2 atoms in a unit cell in a body-centered cubic metal (Refer Figure 12.12(b). The volume of atoms in a body centered cubic metal is calculated using the formula, V atoms = 2 × 4 3 π r 3 = 8 3 π r 3 Where, r is the radius of atoms in the unit cell. π is a constant ( 3.14 ) . The volume of a unit cell in a body centered cubic metal is calculated using the formula, V cell = a 3 ……(2) Where, a is the edge length of the unit cell. Consider Figure 1 that gives the structure of a unit cell of a body centered cubic metal. In the figure, ED = EF = a , FD = b , AF = c .

Study Guide for Chemistry: The Central Science

13th Edition

ISBN: 9780321949288

Author: Theodore E. Brown, James C. Hill

Publisher: PEARSON

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Chapter 2.7, Problem 2.9.1PE

Interpretation Introduction

To determine: The packing efficiency by calculating the fraction of space occupied by atoms in a body-centered cubic metal.

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Chapter 2.7, Problem 2.8.2PE

Chapter 2.7, Problem 2.9.2PE

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Study Guide for Chemistry: The Central Science

Ch. 2.3 - Prob. 2.1.1PE Ch. 2.3 - Prob. 2.1.2PE Ch. 2.3 - Prob. 2.2.1PE Ch. 2.3 - Prob. 2.2.2PE Ch. 2.3 - Prob. 2.3.1PE Ch. 2.3 - Prob. 2.3.2PE Ch. 2.4 - Practice Exercise 1 The atomic weight of copper,...Ch. 2.4 - Prob. 2.4.2PE Ch. 2.5 - Prob. 2.5.1PE Ch. 2.5 - Prob. 2.5.2PE

Ch. 2.6 - 11.93 The vapor pressure of ethanol (C2H5OH) at 19...Ch. 2.6 - Prob. 2.6.2PE Ch. 2.7 - Prob. 2.7.1PE Ch. 2.7 - Prob. 2.7.2PE Ch. 2.7 - Prob. 2.8.1PE Ch. 2.7 - Consider the two-dimensional square lattice of...Ch. 2.7 - Prob. 2.9.1PE Ch. 2.7 - Given the ionic radii and molar masses of Sc3+...Ch. 2.7 - Prob. 2.10.1PE Ch. 2.7 - Prob. 2.10.2PE Ch. 2.8 - Prob. 2.11.1PE Ch. 2.8 - Prob. 2.11.2PE Ch. 2.8 - Prob. 2.12.1PE Ch. 2.8 - Prob. 2.12.2PE Ch. 2.8 - Prob. 2.13.1PE Ch. 2.8 - The table below shows the normal boiling points of...Ch. 2.8 - Prob. 2.14.1PE Ch. 2.8 - Prob. 2.14.2PE Ch. 2.9 - Prob. 2.15.1PE Ch. 2.9 - Prob. 2.15.2PE Ch. 2 - Prob. 1E Ch. 2 - At 280C, raw milk sours in 4.0 h but takes 48 h to...Ch. 2 - At 900 o C, Kc = 0.0108 for the reaction CaCO3(g) ...Ch. 2 - Calculate the molar concentration of OH- in a...Ch. 2 - Pyridinium bromide (C5H5NHBr) is a strong...Ch. 2 - Prob. 6E Ch. 2 - Prob. 7E Ch. 2 - Prob. 8E Ch. 2 - Prob. 9E Ch. 2 - Indicate whether each statement is true or false:...Ch. 2 - Prob. 11E Ch. 2 - Prob. 12E Ch. 2 - Prob. 13E Ch. 2 - At 20 oC, the vapor pressure of benzene (C6 H6) is...Ch. 2 - Summarize the evidence used by J. J. Thomson to...Ch. 2 - Prob. 16E Ch. 2 - Prob. 17E Ch. 2 - Prob. 18E Ch. 2 - Suppose the rate law for the reaction in this...Ch. 2 - Practice Exercise 1 Using the data in Sample...Ch. 2 - Which of the following linear plots do you expect...Ch. 2 - A flask is charged with 0.100 mol of A and allowed...Ch. 2 - Prob. 23E Ch. 2 - Prob. 24E Ch. 2 - Prob. 25E Ch. 2 - Prob. 26E Ch. 2 - The addition of No accelerates the decomposition...Ch. 2 - Prob. 28E Ch. 2 - Prob. 29E Ch. 2 - The rates of many atmospheric reactions are...Ch. 2 - Prob. 31E Ch. 2 - Prob. 32E Ch. 2 - Prob. 33E Ch. 2 - 15.23 The equilibrium constant for the...Ch. 2 - A mixture of 0.10 mol of NO, 0.050 mol of H2, and...Ch. 2 - Prob. 36E Ch. 2 - Prob. 37E Ch. 2 - Prob. 38E Ch. 2 - Prob. 39E Ch. 2 - Prob. 40E Ch. 2 - Practice Exercise 1 Order the following three...Ch. 2 - Practice Exercise 1 What is the pH of a 0.28 M...Ch. 2 - Prob. 43E Ch. 2 - Which of the following diagrams best represent an...Ch. 2 - Prob. 45E Ch. 2 - Prob. 46E Ch. 2 - Prob. 47E Ch. 2 - Prob. 48E Ch. 2 - Prob. 49E Ch. 2 - 16.72 Calculate the molar concentration of OH- in...Ch. 2 - Prob. 51E Ch. 2 - Prob. 52E Ch. 2 - Prob. 53E Ch. 2 - Prob. 54E Ch. 2 - a. Given that Ka for acetic acid is 1.8 10-5 and...Ch. 2 - 16.78 a. Given that Kb for ammonia is 1.8 X 10 -5...Ch. 2 - Prob. 57E Ch. 2 - Prob. 58E Ch. 2 - Prob. 59E Ch. 2 - Prob. 60E Ch. 2 - Prob. 61E Ch. 2 - Prob. 62E Ch. 2 - 16.86 An unknown salt is either KBr, NH4 C1, KCN,...Ch. 2 - Prob. 64E Ch. 2 - Prob. 65E Ch. 2 - 16.89 Based on their compositions and structures...Ch. 2 - Prob. 67E Ch. 2 - 16.91 Indicate whether each of the following...Ch. 2 - Prob. 69E Ch. 2 - Prob. 70E Ch. 2 - Prob. 71E Ch. 2 - Prob. 72E Ch. 2 - Prob. 73E Ch. 2 - Prob. 74E Ch. 2 - Prob. 75E Ch. 2 - Prob. 76E Ch. 2 - Prob. 77E Ch. 2 - Prob. 78E Ch. 2 - Prob. 79E Ch. 2 - Benzoic acid (C6H5COOH) and aniline (C6H5NH2) are...Ch. 2 - Prob. 81E Ch. 2 - Prob. 82E Ch. 2 - Prob. 83E Ch. 2 - Butyric acid is responsible for the foul smell of...Ch. 2 - Prob. 85E Ch. 2 - Prob. 86E Ch. 2 - Prob. 87AE Ch. 2 - 1S.113 Many moderately large organic molecules...Ch. 2 - Prob. 89AE Ch. 2 - Prob. 90AE Ch. 2 - Prob. 91AE Ch. 2 - Prob. 92AE Ch. 2 - Prob. 93AE Ch. 2 - 16.120 At 50 oC, the ion-product constant for H2...Ch. 2 - Prob. 95AE Ch. 2 - Prob. 96AE Ch. 2 - Prob. 97AE Ch. 2 - Prob. 98AE Ch. 2 - Prob. 99AE Ch. 2 - Which two statements about gas mixtures are true?...Ch. 2 - Prob. 101AE Ch. 2 - 13.6 If you compare the solubilities of the noble...Ch. 2 - Prob. 103AE Ch. 2 - Prob. 104AE Ch. 2 - Suppose you had a balloon made of some highly...Ch. 2 - Prob. 106AE Ch. 2 - Indicate whether each statement is true or false:...Ch. 2 - Indicate the type of solute-solvent interaction...Ch. 2 - An ionic compound has a very negative H soln in...Ch. 2 - Prob. 110AE Ch. 2 - Prob. 111AE Ch. 2 - The solubility of Cr (NO3)3 . 9 H2O in water is...

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