# What is the density of a brick of salt that measures 5 cm x 5 cm x 2.5 cm and it weighs 321g?

justaguide | College Teacher | (Level 2) Distinguished Educator

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The density of any object can be derived by dividing its mass by its volume. Density is expressed in units like kg/m^3, g/cm^3, etc.

Here the mass of the brick of salt is 321 g.

The dimensions of the brick are 5 cm x 5 cm x 2.5 cm. This gives the volume of the brick of salt as 5*5*2.5 = 25*2.5 = 62.5 cm^3

The density is 321/62.5 = 5.136 g/cm^3

The density of the brick of salt is 5.136 g/cm^3

giorgiana1976 | College Teacher | (Level 3) Valedictorian

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We'll recall the formula that gives the density of a substance:

Density = mass/Volume

Since the mass is given, we'll have to calculate the volume of the brick of salt:

V = length*width*height

V = 5*5*2.5

V = 62.5 cm^3

Now, we'll determine the density:

Density = 321/62.5

Density = 5.136 g/cm^3

The requested density of the brick of salt is Density = 5.136 g/cm^3.