$$Moles \ of \ solute = Concentration (M) \times Volume \ of \ solution (L)$$
In this case, the concentration of the HCl solution is 12 M and the volume of the solution is 50 mL, which is equivalent to 0.050 L.
Substituting these values into the formula, we get:
$$Moles \ of \ HCl = 12 M \times 0.050 L = 0.600 \ moles$$
Therefore, there are 0.600 moles of HCl in 50 mL of a 12 M HCl solution.
