you need
  • - Table density substances;
  • - Calculator.
Guide
1
There is a formula that relates the three characteristics: volume, mass and density: m = pv

designations for these parameters are of the form:
V - volume ml
m -weight, g
p - density, g / ml
The simplest example can be considered estimates of water, which has a constant density of 1 g / ml.
2
Example № 1. Calculate the mass of water if its volume is 500 ml.

Record formula m = pv
Substitute data provided values:
m (water) = 1 g / ml x 500 ml = 500 g
3
Likewise, you can convert milliliters to gram
s, not only forwater, and other substances.The key is to know the values ​​of density, which is a reference.They can be found in textbooks of physics, chemistry, or on the Internet.Furthermore sometimes the amount may not be given in milliliters, and in liters, cubic centimeters or meters.In this case, the proposed data must necessarily translate into milliliters, and then carry out further calculations.
4
Example № 2. Calculate the weight of the oil, if its volume is 200 ml.Density
various kinds of vegetable oils varies 0,87-0,98 g / cm3 or 0,87-0,98 g / ml.If you know the specific value of the density of oil, it is easy to calculate the mass.
example, the density is 0.93 g / ml.
Substitute this value into the formula m = pv
m (oil) = 0.93 g / ml x 200 ml = 186 g
5
If necessary, on the same formula can perform the reverse conversion, theWe have to transfer programs in milliliters.
Example № 3. Calculate the amount of water, if its weight is 500 grams

Record formula m = pv
derive from it the volume V = m / V
Place a proposed condition values:
V (water) = 500 g / 1g / ml = 500 ml