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

Correct Answer:

Option A – 0.015 mole

Explanation

Number of moles = (conc. in mol/dm³ X volume in cm³)/1000
(0.75 X 20)/100 = 0.015 mole