JAMB - Chemistry (2007 - No. 21)
Calculate the number of moles of HCl present in 20cm3 of a 0.75M solution of the acid
0.015 mole
0.038 mole
3.800 moles
1.500 moles
설명
Number of moles = (conc. in mol/dm3*volume in cm3)/1000
(0.75 * 20)/100 = 0.015 mole
(0.75 * 20)/100 = 0.015 mole