[jl]

Calculate the molarity of the resulting solution prepared by diluting 25.0 mL of 18.0% ammonium chloride (density = 1.05 g/mL) to a final volume of 80.0 mL.

Since this is dilution, I think I would be using the formula M₁V₁=M₂V₂.  I am having trouble determining the molarity for the M₁ value.  Furthermore, I am not exactly sure how the 18.0% NH₄Cl comes in to play.  I do know that the final answer should be 1.10 M, but I do not know how to get there.  Any explanation/clarification would be appreciated.

[Borek]

First step is about converting % w/w to molarity...