Submit your detailed Question here...29.2 % (w/w) HCl stock solution has density of 1.25 g mL-1. The molecular weight of HCl is 36.5 g mol-1.The volume (mL) of stock solution required to prepare a 200 mL solution of 0.4 M HCl is

29.2 % (w/w) HCl stock solution has density of 1.25 g mL-1. The molecular weight of HCl is 36.5 g mol-1. The volume (mL) of stock solution required to prepare a 200 mL solution of 0.4 M HCl is as follows
stock solution of HCl=29.2%(w/w)
molarity of stock solution of HCl=29.2*1000*1.25/36.5*100
if volume of stock solution required is Vml
then
v*29.2/36.5*1000/80=200*.4
v=8ml