How do i calculate weight from volume?

Answer 1

First you need to calculate mass.

mass = volume x densityIn other words, you need to know the density for the specific material - there is simply no standard conversion between volume and mass.

The above formula will give you the mass, for example in kilograms; if you really want the weight (for example, in newtons), you need to multiply the mass times the gravity, which is about 9.8 newton/kilogram in SI units.

Answer 2

an object weighing 1.840 kg has a volume of 0.0015m3. what is the density of the object in m/cm3

Answer 3

With only the information that is given in the question, you cannot.