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JAMB Chemistry 2007 Question 26

Question 26

Mole Concept and Stoichiometry

Calculate the mass of chlorine gas which occupies a volume of 1.12 dm3 at s.t.p. [Cl=35.5, Molar volume of gas at s.t.p. = 22.4 dm3]

  1. A.15.50 g
  2. B.7.10 g
  3. C.3.55 g
  4. D.1.80 g.
Show the answer and explanation

Answer: C (3.55 g)

Explanation

Moles of Cl2 = 1.12/22.4 = 0.05 mol. Mass = 0.05 × 71 = 3.55 g.