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The relative atomic mass of a naturally occurring lithium consisting of 90% \(^7 _3\)Li and...

Chemistry
JAMB 2011

The relative atomic mass of a naturally occurring lithium consisting of 90% \(^7 _3\)Li and \(^6 _3\)10% Li is

  • A. 6.9
  • B. 7.1
  • C. 6.2
  • D. 6.8
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Correct Answer: Option A
Explanation

R.A.M = m\(_1 \alpha_1\) + m\(_2 \alpha_2\)

= 7(90/100) + 6(10/100)

= 6.3 + 0.6

= 6.9

There is an explanation video available below.

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Explanation Video

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