What is the volume in milliliters of 7.66 g of acetone

In order to solve this, we have to know the density of acetone because it is the ratio of mass to volume. At a certain temperature and pressure, the density of a specific substance does not change. It is an intrinsic property of a substance with temperature and pressure dependence. Assuming this is in normal conditions, the density is equal to 0.784 g/mL. So, the volume would be equal to

Volume = Mass/Density

Volume = 7.66 g/0.784 g/mL = 9.77 mL