The density of the object is 2.91 g/mL
The density of an irregular object can be measured by the displacement method. In this method, a known volume of water is poured into measuring cylinder and the irregular object is inserted into the water. The change in the volume of water is the volume of the irregular object.
In this case;
Original volume of water = 35.5 mL
Volume after displacement = 74.0 mL
Volume of object = 74.0 mL - 35.5 mL
Volume of object = 38.5 mL
Mass of object = 112.14 g.
Density of object = mass/volume
Density = 112.14 g/38.5 mL
Density = 2.91 g/mL
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