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JAMB Chemistry 2007 Objective — Question 18

Question 18 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2007 Objective paper, with the correct answer and a full explanation.

Calculate the number of moles of HCl present in 20cm3 of a 0.75M solution of acid.

A. 3.800 moles
B. 1.500 moles
C. 0.038 mole
D. 0.015 moleCorrect

Explanation

Moles = concentration x volume(dm3) = 0.75 x 0.020 = 0.015 mole.

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