Final answer:
The mass of the object is calculated using the given density of 20 g/cm³ and the water displacement of 5 mL. By converting the volume to cm³ and using the formula for density, it can be concluded that the object's mass is 100.0 g.
Step-by-step explanation:
To find the mass of an object using its density and the volume of water it displaces, we can use the formula:
Density (d) = Mass (m) / Volume (V)
Given the density of the object is 20 g/cm3 and it displaces 5 mL of water, we can calculate the mass as follows:
First, note that 1 mL is equivalent to 1 cm3 for the conversion of units. Therefore, the volume of the object is 5 cm3.
Now, rearranging the formula to solve for mass gives us:
m = Density (d) × Volume (V)
Substitute the given values:
m = 20 g/cm3 × 5 cm3
m = 100 g
Thus, the mass of the object is 100.0 g, which corresponds to option C).