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

Chemistry
JAMB 2007
Calculate the number of moles of HCl present in 20cm3 of a 0.75M solution of the acid
  • A. 0.015 mole
  • B. 0.038 mole
  • C. 3.800 moles
  • D. 1.500 moles
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Correct Answer: Option A
Explanation
Number of moles = (conc. in mol/dm3*volume in cm3)/1000
(0.75 * 20)/100 = 0.015 mole

There is an explanation video available below.

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts