Answer:
7.23g/cubic cm (to 3 significant figures/2 decimal places)
Step-by-step explanation:
Density=mass/volume
Since this object displaces 2.2mL of water, its volume is 2.2mL=2.2 cubic cm.
Hence, take 15.9g (mass) รท 2.2 cubic cm (volume) to get 7.23g/cubic cm, which is the density.
But remember that if the mass is given in a unit that is not grams, and if the volume is given in a unit that is not mL or cubic cm, u must convert the mass and the volume to be in the units of grams and cubic cm bc those r the SI units.
:-) hope it helps!!