Question

How can density be used to identify substances?

Answer 1

HELLO MATE

YOUR ANSWER

You can identify an unknown substance by measuring its density and comparing your result to a list of known densities.

Density = mass/volume. Assume that you have to identify an unknown metal. You can determine the mass of the metal on a scale. You can determine the volume by dropping the object into a graduated cylinder containing a known volume of water and measuring the new volume. You divide the mass by the volume and compare the density to a list of known densities.

EXAMPLE

A metal bolt with a mass of 99.7 g is dropped into a graduated cylinder containing 50.0 cm³ of water. The new volume reads

72.1 cm³. Identify the metal.

Solution

V = 72.1 cm³ - 50.0 cm³ = 22.1 cm³

D =

m

V

=

99.7

g

22.1

c

m

³

= 4.51 g/cm³

Now you compare your density with a list obtained from your instructor or from an on-line source such as

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Answer 2

❣️$\huge\underline\mathbb{heya}$❣️

Density = mass/volume.

Assume that you have to identify an unknown metal.

You can determine the volume by dropping the object into a graduated cylinder containing a known volume of water and measuring the new volume.

You divide the mass by the volume and compare the density to a list of known densities.

HOPE IT HELPS