The relative atomic mass of a naturally occurring lithium consisting of 90%(frac{7}{3})Li and 10%(frac{6}{3})Li is

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
Correct Answer: Option D
Explanation

((frac{90}{100}) x 7) + ((frac{10}{100}) x 6)
= 6.3 + 0.6 = 6.9

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