Answer:
For water, its mass in grams is equal to its volume in mililiters.
Explanation:
In general, you can calculate the mass of a substance multiplying its volume with the density:
Mass(g) = Volume(mL) × Density(g/mL)
With the water, it is easiest because density of water is 1g/mL, that means:
(Water) Mass = Volume × Density.
Mass = Volume × 1.
Mass = Volume
For example. if you have 5mL of water, its mass is 5g.