100 millilitre of water is equal to approximately 100 grams. This is the derives by the formula; the accumulation/mass of a element (Mi) divided by the volume of the mixture V.
1 Additional Answer
1 Ml water weighs 1 gram so 100Ml weighs 100 grams. And this is because the density of water varies with temperature. I ml of water weighs 1 gram or 0.0352739619 ounces and 1 Imperial fluid ounce of weighs=28.41 grams, 1 US fluid ounce=29.57 grams.