The lattice energy of NaF is 904 kJ/mol, and the Na–F distance is 190 pm. An unknown metal oxide crystallizes in the same structure as NaF but with  distance of 207 pm. The metal oxide has the formula MO, where M is the unknown metal. Which of the following values most closely approximates the lattice energy of the metal oxide?

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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The lattice energy of NaF is 904 kJ/mol, and the Na–F distance is 190 pm. An unknown metal oxide crystallizes in the same structure as NaF but with  distance of 207 pm. The metal oxide has the formula MO, where M is the unknown metal. Which of the following values most closely approximates the lattice energy of the metal oxide?

 

Question 6 options:

 

a) 

256 kJ/mol

 

b) 

512 kJ/mol

 

c) 

904 kJ/mol

 

d) 

1046 kJ/mol

 

e) 

4090 kJ/mol

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