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JAMB Chemistry 2014 Question 11

Question 11

Atomic Structure

A silicon-containing ore has 92% 28Si, 5% 29Si and 3% 30Si. Calculate the relative atomic mass of the silicon.

  1. A.14.00
  2. B.29.00
  3. C.28.11
  4. D.28.00
Show the answer and explanation

Answer: C (28.11)

Explanation

Relative atomic mass = (92 × 28 + 5 × 29 + 3 × 30)/100 = (2576 + 145 + 90)/100 = 28.11.