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General Chemistry

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Calculate Average Atomic Mass of Lithium from Experiment

CHEM-L1@RVH

In a sample of 400 lithium atoms, it is found that 30 atoms are lithium-6 (6.015 g/mol) and 370 atoms are lithium-7 (7.016 g/mol).

Calculate the average atomic mass of lithium.

A

6.94

B

6.58

C

51.6

D

6.09