Answer:
0.748 g/cm³
Step-by-step explanation:
You want the density represented by 0.187 kg in a volume of 250 mL.
Density
Density is the ratio of mass to volume, as you can tell by its units. Here, it is useful to remember that 1 kg = 1000 g, and 1 mL = 1 cm³.
The density is ...
(187 g)/(250 cm³) = 0.748 g/cm³