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JAMB Chemistry 2022 Question 17

Question 17

Mole Concept and Stoichiometry

Calculate the percentage of sulphur in sulphur (iv) oxide [S=32, O = 16].

  1. A.25%
  2. B.66%
  3. C.50%
  4. D.40%
Show the answer and explanation

Answer: C (50%)

Explanation

SO2 has molar mass 32 + 32 = 64, so %S = 32/64 × 100 = 50%.