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1. Cobalt crystallizes in a HCP unit cell. Its atomic radius is 0.1253 nm. Its density is 8.900 kg/m. Using this information, estimate Avogadro's number.

1. Cobalt crystallizes in a HCP unit cell. Its atomic radius is 0.1253 nm. Its density is 8.900 kg/m. Using this information, estimate Avogadro's number.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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PROBLEM SOLVING: Solve the following problems completely, neatly and orderly. Express all answers to the nearest 4th decimal place. No unit or wrong unit means wrong answer. I. 1. Cobalt crystallizes in a HCP unit cell. Its atomic radius is 0.1253 nm. Its density is 8,900 kg/m³. Using this information, estimate Avogadro's number. 2. A hypothetical alloy has a face-centered cubic unit cell. Its density is 10,470 kg/m3 and its atomic weight is 106.8 g/mole. a) What is the atomic radius of the alloy in cm? b) What is the volume of the single atom of the alloy in cm? 3. A mole of a newly discovered crystalline substance weighs 14.56 grams and displaces 2.3 mL of water. What is the density of the crystal? Find the atomic radius and density of each atom if it is a simple cubic cell? BCC? FCC? HCP?
Transcribed Image Text:PROBLEM SOLVING: Solve the following problems completely, neatly and orderly. Express all answers to the nearest 4th decimal place. No unit or wrong unit means wrong answer. I. 1. Cobalt crystallizes in a HCP unit cell. Its atomic radius is 0.1253 nm. Its density is 8,900 kg/m³. Using this information, estimate Avogadro's number. 2. A hypothetical alloy has a face-centered cubic unit cell. Its density is 10,470 kg/m3 and its atomic weight is 106.8 g/mole. a) What is the atomic radius of the alloy in cm? b) What is the volume of the single atom of the alloy in cm? 3. A mole of a newly discovered crystalline substance weighs 14.56 grams and displaces 2.3 mL of water. What is the density of the crystal? Find the atomic radius and density of each atom if it is a simple cubic cell? BCC? FCC? HCP?
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