Question

What is the density of the solid object that is weighed and submerged in water? The object's weight is 8.24g and is placed in a beaker filled with 18.5 mL of water. When It is placed in the water, it rises to 23.1 mL.

Answer 1

Density (D) is the quotient obtained when mass (m) is divided by volume (v). 
                                   D = m / v
The volume is the difference of the volume read after and before the object is placed in the beaker,
                                   v = 23.1 mL - 18.5 mL = 4.6 mL
Substituting the known values for the density,
                                  D = 8.24 g / 4.6 mL = 1.79 g/mL
Thus, the density is approximately equal to 1.79 g/mL.