Răspuns :
c%=md/ms*100=>md=400*36,5/100=146 g HCl
nr moli HCl = masa HCl/masa molara HCl = 146/36.5=>nr moli HCl = 4
nr moli HCl = masa HCl/masa molara HCl = 146/36.5=>nr moli HCl = 4