The relative atomic mass of a naturally occurri... - JAMB Chemistry 2016 Question
The relative atomic mass of a naturally occurring lithium consisting of 90%(\frac{7}{3})Li and 10%(\frac{6}{3})Li is
A
6.2
B
6.8
C
7.1
D
6.9
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Correct Option: D
((\frac{90}{100}) x 7) + ((\frac{10}{100}) x 6)
= 6.3 + 0.6 = 6.9
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