show the relation between density and relative density
Answers
Answer:
The relation between relative density and density is that relative density of a substance is its density itself without its unit
* Density is the mass per unit volume of a body . its unit is Kg/m*3
* Relative density is the ratio of density of a body to the density of water at 4°C. it has no unit
what is density
Density is the mass per unit of volume of a substance. It is calculated using the formula
density
=
mass
volume
. Mass units include some form of grams, such as kilograms, grams, milligrams. Volume units may be in liters, milileters, cubic centimeters (
cm
3
).
If a substance has a mass of
62.3g
and a volume of
85.6cm
3
, you would calculate its density as
density
=
mass
volume
=
62.3g
85.6cm
3
=
0.728g/cm
3
There is a device called a density triangle, that can help you remember the density formula, and use it to find mass when density and volume are known; and to find volume when density and mass are known.
Density units are most commonly
g/cm
3
,
g/mL
,
g/L
, and
kg/m
3
.
EXPLANATION
What is relative density?
Is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water. The term "relative density" is often preferred in scientific usage. It is defined as a ratio of density of particular substance with that of water.
If a substance's relative density is less than one then it is less dense than the reference; if greater than 1 then it is denser than the reference. If the relative density is exactly 1 then the densities are equal; that is, equal volumes of the two substances have the same mass. If the reference material is water then a substance with a relative density (or specific gravity) less than 1 will float in water. For example, an ice cube, with a relative density of about 0.91, will float. A substance with a relative density greater than 1 will sink.
Temperature and pressure must be specified for both the sample and the reference. Pressure is nearly always 1 atm (101.325 kPa). Where it is not, it is more usual to specify the density directly. Temperatures for both sample and reference vary from industry to industry. In British brewing practice the specific gravity as specified above is multiplied by 1000.Specific gravity is commonly used in industry as a simple means of obtaining information about the concentration of solutions of various materials such as brines, sugar solutions (syrups, juices, honeys, brewers wort, must, etc.