Final answer:
The density of the block is calculated by dividing its mass (85.6 g) by its volume (65.625 cm³), resulting in a density of approximately 1.305 g/cm³.
Step-by-step explanation:
To find the density of a block, you must divide the mass of the block by its volume. The formula for density is Density = Mass / Volume. To calculate the volume of the block, multiply its length by its width and its height. In this case, the volume V is 7.5 cm × 2.5 cm × 3.5 cm, which equals 65.625 cm³. Then, to find the density, divide the mass of the block, which is 85.6 g, by the volume you just calculated. Therefore, the density ρ is 85.6 g / 65.625 cm³, which simplifies to approximately 1.305 g/cm³.