Final answer:
The mass of 1000.0 mL of water at 25 °C is 1000.0 g.
Step-by-step explanation:
The mass of water depends on the volume of water and its density. The density of water is approximately 1 gram per cubic centimeter (g/cm³) or 1 kilogram per liter (kg/L) under standard conditions (at a temperature of 4 degrees Celsius or 39.2 degrees Fahrenheit).
The mass of 1000.0 mL of water at 25 °C can be calculated using the density of water, which is approximately 1.0 g/mL. Since the volume is given in milliliters, we can directly convert it to grams by multiplying it by the density.
Mass of water = 1000.0 mL * 1.0 g/mL = 1000.0 g.