However, a common approximation is that the density of perfume is around 0.8 to 1 gram per milliliter (g/ml).
Therefore:
* If the density is 0.8 g/ml: 100 ml * 0.8 g/ml = 80 grams
* If the density is 1 g/ml: 100 ml * 1 g/ml = 100 grams
So, a reasonable estimate for the mass of 100 ml of perfume would be between 80 and 100 grams.
To get a more precise answer, you would need to know the exact density of the specific perfume in question.