The amount of the solute is constant during dilution. So the mole number of HCl is 2*1.5=3 mole. The volume of HCl stock is 3/12=0.25 L. So using 0.25 L stock solution and dilute to 2.0 L.
I think you forgot to attach a picture
breaking bonds in reactants and forming new bonds in products. Breaking bonds requires energy, and forming bonds releases energy.
A. Pyrite is an ore of gold and is used to jewelry making is a false statement
1 proton and-1 electrons and 0 neutron