What is the volume of 12.0 m hydrochloric acid that contains 3.646 g of hcl solute (36.46 g/mol) ?

The amount of the HCl molecule would be: 3.646g / (36.46/g/mol) = 0.1mol

The concentration of a solution is count by dividing the amount of mol with the volume. Then, the calculation for finding the volume would be:

concentration = number of molecule / volume

12mol/liter = 0.1 mol / volume

volume = 0.1 mol / (12 mol/liter)

volume = 0.00833 liter = 8.33ml