Final answer:
The density of 100 mL of water from a reservoir with a density of 1 g/cm³ is also 1 g/cm³.
Step-by-step explanation:
The density of water is 1 g/cm³. This means that 1 gram of water occupies 1 cubic centimeter of space. To find the density of 100 mL of water, we can use the fact that density is a ratio of mass to volume. Since the density of water is 1 g/cm³, and 100 mL is 10 times the volume of 10 mL, we can conclude that the density of 100 mL of water is also 1 g/cm³.