calculate the molarity of a solution made by diluting 431 mL of 0.164 M HCl solution to a volume of 113 mL. round your answer to 3 sig. fig.

The problem seems to have a misunderstanding. Dilution is the process of reducing the concentration of a solute in solution, usually simply by mixing with more solvent like water. So, you can't dilute a 431 mL solution to 113 mL. The final volume should be greater than the initial volume.

However, if you meant that 431 mL of 0.164 M HCl solution was diluted to a larger volume and you took 113 mL of that diluted solution, then we would need the final volume to calculate the molarity of the diluted solution.

If you meant that 113 mL of a 431 mL solution with a molarity of 0.164 M was taken, then the molarity remains the same, 0.164 M, because molarity is a property that does not depend on the volume of the solution.

Please clarify the problem so I can provide a more accurate answer.