Describe how to make 500.0 mL of 3.6 M acetone
What is the solvent? Water?
How many mols do you want? That's mols = M x L = ?
Then mols = grams/molar mass. You know molar mass and mols, solve for grams.
Weigh out that many grams of acetone, add to a 500 mL volumetric flask, add H2O to the mark, stopper and shake thoroughly to mix.