Chemistry: An Atoms-Focused Approach
14th Edition
ISBN: 9780393600681
Author: Gilbert
Publisher: W. W. Norton & Company
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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 cell
part 2
The structure of the unit cell when CaF2 crystallizes is shown below:
What is the arrangement of the Ca2+ ions (white spheres)?
FCC
SC
HCP
BCC
FIGURE P12.55
12 56. If some of the sulfide ions in zinc sulfide are replaced by
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Chapter 18 Solutions
Chemistry: An Atoms-Focused Approach
Ch. 18 - Prob. 18.1VPCh. 18 - Prob. 18.2VPCh. 18 - Prob. 18.3VPCh. 18 - Prob. 18.4VPCh. 18 - Prob. 18.5VPCh. 18 - Prob. 18.6VPCh. 18 - Prob. 18.7VPCh. 18 - Prob. 18.8VPCh. 18 - Prob. 18.9VPCh. 18 - Prob. 18.10VP
Ch. 18 - Prob. 18.11VPCh. 18 - Prob. 18.12VPCh. 18 - Prob. 18.13VPCh. 18 - Prob. 18.14VPCh. 18 - Prob. 18.15VPCh. 18 - Prob. 18.16VPCh. 18 - Prob. 18.17VPCh. 18 - Prob. 18.18VPCh. 18 - Prob. 18.19QACh. 18 - Prob. 18.20QACh. 18 - Prob. 18.21QACh. 18 - Prob. 18.22QACh. 18 - Prob. 18.23QACh. 18 - Prob. 18.24QACh. 18 - Prob. 18.25QACh. 18 - Prob. 18.26QACh. 18 - Prob. 18.27QACh. 18 - Prob. 18.28QACh. 18 - Prob. 18.29QACh. 18 - Prob. 18.30QACh. 18 - Prob. 18.31QACh. 18 - Prob. 18.32QACh. 18 - Prob. 18.33QACh. 18 - Prob. 18.34QACh. 18 - Prob. 18.35QACh. 18 - Prob. 18.36QACh. 18 - Prob. 18.37QACh. 18 - Prob. 18.38QACh. 18 - Prob. 18.39QACh. 18 - Prob. 18.40QACh. 18 - Prob. 18.41QACh. 18 - Prob. 18.42QACh. 18 - Prob. 18.43QACh. 18 - Prob. 18.44QACh. 18 - Prob. 18.45QACh. 18 - Prob. 18.46QACh. 18 - Prob. 18.47QACh. 18 - Prob. 18.48QACh. 18 - Prob. 18.49QACh. 18 - Prob. 18.50QACh. 18 - Prob. 18.51QACh. 18 - Prob. 18.52QACh. 18 - Prob. 18.53QACh. 18 - Prob. 18.54QACh. 18 - Prob. 18.55QACh. 18 - Prob. 18.56QACh. 18 - Prob. 18.57QACh. 18 - Prob. 18.58QACh. 18 - Prob. 18.59QACh. 18 - Prob. 18.60QACh. 18 - Prob. 18.61QACh. 18 - Prob. 18.62QACh. 18 - Prob. 18.63QACh. 18 - Prob. 18.64QACh. 18 - Prob. 18.65QACh. 18 - Prob. 18.66QACh. 18 - Prob. 18.67QACh. 18 - Prob. 18.68QACh. 18 - Prob. 18.69QACh. 18 - Prob. 18.70QACh. 18 - Prob. 18.71QACh. 18 - Prob. 18.72QACh. 18 - Prob. 18.73QACh. 18 - Prob. 18.74QACh. 18 - Prob. 18.75QACh. 18 - Prob. 18.76QACh. 18 - Prob. 18.77QACh. 18 - Prob. 18.78QACh. 18 - Prob. 18.79QACh. 18 - Prob. 18.80QACh. 18 - Prob. 18.81QACh. 18 - Prob. 18.82QACh. 18 - Prob. 18.83QACh. 18 - Prob. 18.84QACh. 18 - Prob. 18.85QACh. 18 - Prob. 18.86QACh. 18 - Prob. 18.87QACh. 18 - Prob. 18.88QACh. 18 - Prob. 18.89QACh. 18 - Prob. 18.90QACh. 18 - Prob. 18.91QACh. 18 - Prob. 18.92QACh. 18 - Prob. 18.93QACh. 18 - Prob. 18.94QACh. 18 - Prob. 18.95QACh. 18 - Prob. 18.96QACh. 18 - Prob. 18.97QACh. 18 - Prob. 18.98QACh. 18 - Prob. 18.99QACh. 18 - Prob. 18.100QACh. 18 - Prob. 18.101QACh. 18 - Prob. 18.102QACh. 18 - Prob. 18.103QACh. 18 - Prob. 18.104QACh. 18 - Prob. 18.105QACh. 18 - Prob. 18.106QACh. 18 - Prob. 18.107QACh. 18 - Prob. 18.108QACh. 18 - Prob. 18.109QACh. 18 - Prob. 18.110QACh. 18 - Prob. 18.111QACh. 18 - Prob. 18.112QACh. 18 - Prob. 18.113QACh. 18 - Prob. 18.114QACh. 18 - Prob. 18.115QACh. 18 - Prob. 18.116QACh. 18 - Prob. 18.117QACh. 18 - Prob. 18.118QACh. 18 - Prob. 18.119QACh. 18 - Prob. 18.120QACh. 18 - Prob. 18.121QACh. 18 - Prob. 18.122QACh. 18 - Prob. 18.123QACh. 18 - Prob. 18.124QACh. 18 - Prob. 18.125QACh. 18 - Prob. 18.126QACh. 18 - Prob. 18.127QACh. 18 - Prob. 18.128QACh. 18 - Prob. 18.129QACh. 18 - Prob. 18.130QACh. 18 - Prob. 18.131QACh. 18 - Prob. 18.132QACh. 18 - Prob. 18.133QA
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- Why is the C 60form of carbon called buckminsterfullerene?arrow_forward11.Demonstrate the fraction of these sites in an FCC lattice that Fe2+ ions would need to occupy in order to maintain charge neutrality with the O2– ions sitting in FCC lattice positions of a unit cell. 12.Describe how the bonding and atomic arrangement in diamond differs from that in other allotropes of carbon such as graphite, graphene, and fullerenes (Buckyballs). 13.The silicate anion (SiO44-) “orthosilicate” is the basic building block of all silicate materials. Draw the Lewis Dot Structure for the (SiO44-) ion. Based on your Lewis dot structure, what is the predicted geometry for the (SiO44-) ion? What kind of bonds occur between Si and O in the (SiO44-) ion?arrow_forwardAn AX ceramic compound has an HCP crystal structure. If the radii of the A and X ions are 0.114 and 0.255 nm, respectively, and the respective atomic weights are 44.58 and 95.24 g/mol, what is the density (in g/cm3) of this material?arrow_forward
- Calculate the empirical formula and density of nitinol, the memory alloy composed of nickel and titanium with the unit cell shown in Figure P12.9. The atomic radii of Ni and Ti are 124 and 147 pm, respectively. lod oi shizo = Ti = Niarrow_forwardThe unit cell of an intermetallic compound consists of a face-centered cube that has an atom of element X at each corner and an atom of element Y at the center of each face. What is the formula of the compound ?arrow_forwardDraw an orthorhombic unit cell, and within that cell a [121] direction.arrow_forward
- What is the arrangement of the Ca2+ ions (white spheres)? A BCC в) FCC HCP D scarrow_forward1)Pure gold has a density of 19.32 g/cm3, and the atoms are packed in a face-centered cubic crystal lattice. What is the radius of a gold atom in pm? 2)The cubic unit cell parameter (a) of polonium (α-Po) is 335 pm. Use the Goldschmidt correction (Table 1) to calculate a metallic radius for this element.arrow_forwardTwo hypothetical elements A and B, adopt simple cubic and body-centered cubic cells, respectively. They have the same atomic radii of 120 pm and the atomic mass of A is 114 g/mol. They also have the same densities. The hypothetical atom C is inserted to the center of unit cell of A. In this new unit cell, the coordination numbers of A and C are 14 and 8, respectively. a. Calculate the APF. b. Calculate the atomic radius of C. c. Calculate the molecular formula.arrow_forward
- In the unit cell drawing on the right, why do we see eight Sm atoms andnine Co atoms if the empirical formula is SmCo5?arrow_forwardThe unit cell of an intermetallic compound consists of a face-centered cube that has an atom of element X at each corner and an atom of element Y at the center of each face. What would be the formula if the positions of the two elements were reversed in the unit cell ?arrow_forward1. A metallic solid ingot has a mass of 14.7 grams. It was loaded into a graduated cylinder containing 40.0 mL or water. Upon addition of the ingot, the volume of the water and the ingot was 41.6 mL. What is the density of the ingot? 2. Assuming the solid ingot in question 1 is polonium (Po, element 84) which packs in a primitive cubic unit cell structure calculate the packing efficiency of the unit cell? Atoms touch along edge. a = 2r Carrow_forward
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