JAMB Chemistry 2007 Objective — Question 5

Question 5 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2007 Objective paper, with the correct answer and a full explanation.

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

A. 1.80g
B. 3.55gCorrect
C. 7.10g
D. 15.50g

Explanation

Moles of Cl2 = 1.12/22.4 = 0.05mol. Molar mass Cl2 = 71g/mol. Mass = 0.05 x 71 = 3.55g.

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