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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/m³. 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/m³. Using this information, estimate Avogadro's number.

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter12: The Solid State
Section: Chapter Questions
Problem 51GQ: The solid-state structure of silicon is shown below. Unit cell for silicon (a) Describe this crystal...
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PLEASE ANSWER NUMBER 1

I. 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. 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/m2, 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??
Transcribed Image Text:I. 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. 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/m2, 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??
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