a) An aqueous solution is 30.0% hydrofluoric acid (HF, molar
mass = 20.01 g/mol) by weight. If the density of a 30.0% HF
solution in water is 1.101 g/mL, what is the molality of the
solution (to 3 significant figures)?
b) How many mL of 0.250 M Ba(OH) 2 is needed to completely
neutralize a 12.0 mL of 1.00 M HCl? Report your volume in mL to 3
significant figures