text: 4.25 g   of   gaseous hcl   are dissolved in water to give a final solution of  28.2 ml . what is the molarity 4.25 g   of   gaseous hcl   are dissolved in water to give a final solution of   28.2 ml .   what is the molarity of this solution ?   enter a numeric answer only, no units. molarity = mols/ v (l)  first find out how many moles you have in your sample. the molar mass for hcl is 1 + 35.5 = 36.5 g/mol  4.25 g / 36.5 g/mol = 0.1164 mols hcl  next change ml to l 28.2/1000 = 0.028 l  m=0.1164/0.02828 m = 4.129 m