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JAMB Chemistry 2016 Objective — Question 17

Question 17 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2016 Objective paper, with the correct answer and a full explanation.

17. The relative atomic mass of a naturally occurring lithium consisting 90% ⁷Li and 10% ⁶Li is A. 6.2 B. 6.8 C. 7.1 D. 6.9

A. 6.2
B. 6.8
C. 7.1
D. 6.9Correct

Explanation

R.A.M = (Mass1×%1 + Mass2×%2)/100 = (7×90/100)+(6×10/100) = 6.3+0.6 = 6.9.

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