A solid block of exactly 100.0 cm3 has a mass of 153.6 g. determine its density. will the block sink or float on water?

The density of a substance can be calculated by simply taking the ratio of mass and volume. That is:

density = mass / volume

density = 153.6 g / 100 cm^3

density = 1.536 g / cm^3

The density of water is 1 g / cm^3. Since the solid block has higher density than water, therefore it will sink on water.