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Author Question: The isotope lithium-7 has a mass of 7.0160 atomic mass units, and the isotope lithium-6 has a mass ... (Read 653 times)

FButt

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on: Aug 27, 2018
The isotope lithium-7 has a mass of 7.0160 atomic mass units, and the isotope lithium-6 has a mass of 6.0151 atomic mass units.
 
  Given the information that 92.58 percent of all lithium atoms found in nature are lithium-7 and 7.42 percent are lithium-6, calculate the atomic mass of lithium, Li (atomic number 3).
  A) 7.0160 amu
  B) 6.942 amu
  C) 6.495 amu
  D) 13.031 amu

Question 2

The American Chemistry Council is ________.
 
  A) a society of chemistry educators
  B) a special interest group
  C) an organization of environmental lawyers
  D) an advisory panel to the U.S. Congress


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wergv

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Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

B


FButt

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Reply #2 on: Aug 27, 2018
Thank you!


wergv

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Reply #3 on: Aug 27, 2018
Always glad to help...


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