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JAMB Chemistry 2020 Question 25

Question 25

Gas Laws

The vapour density of XO2(g) given as 32, calculate the atomic mass of X

  1. A.11
  2. B.20
  3. C.32
  4. D.12
Show the answer and explanation

Answer: C (32)

Explanation

Relative molecular mass = 2 × vapour density = 64. X + 2(16) = 64, so X = 32.