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JAMB Chemistry 1981 Question 38

Question 38

Mole Concept and Stoichiometry

Pure sulphuric acid is a liquid of 1.84 density. What volume of it would be required to prepare 250 cm3 of 0.2 M solution? (H = 1, S = 32, O = 16)

  1. A.2.00
  2. B.2.66
  3. C.3.00
  4. D.3.66
  5. E.4.00
Show the answer and explanation

Answer: B (2.66)

Explanation

Moles needed = 0.250 × 0.2 = 0.05 mol, which is 0.05 × 98 = 4.9 g. Volume = mass/density = 4.9/1.84 = 2.66 cm3.