Final answer:
The density of the liquid is 0.625 kg/L.
Step-by-step explanation:
The density of a liquid can be calculated using the formula:
p = m/V
where p is the density, m is the mass, and V is the volume.
In the given example, the mass of the aluminum ball is 4.00 kg and its apparent mass when submerged in the liquid is 2.50 kg.
Using the formula, we can calculate the density of the liquid as:
p = m/V
p = 2.50 kg / 4.00 kg
p = 0.625 kg/L
Therefore, the density of the liquid is 0.625 kg/L.