Question

If a rock sample has a mass of 1.17 g and a volume of 0.33 cm3, what type of rock is it? if a rock sample has a mass of 2.7 g and a volume of 1.1 cm3, what type of rock is it? if a rock sample has a mass of 11.2 g and a volume of 1.9 cm3, what type of rock is it?

Answer 1

The given rock is a diamond because its density ranges among 3.5 and 3.54 g/cm³.

What is density?

Density is the mass of a specific material per unit volume. Density is commonly measured in grams per cubic centimetre. Water, for example, has a density of 1 gram per cubic centimetre, whereas Earth has a density of 5.51 grams per cubic centimetre.

• Density is also measured in kilograms per cubic metre (or metre-kilogram-second or SI units).
• Air has a density of 1.2 kilograms per cubic metre. Textbooks and handbooks list the densities of popular solids, liquids, and gases.
• Density provides an easy way to calculate a body's mass from its volume and vice versa; a mass is proportional to the quantity multiplied by density (M = Vd), or the volume is equal to mass divided by the density. (V = M/d).

The formula for density is;

D = M/V,

where,

D is density,

M is mass ( = 1.17 g)

V is volume (0.33 cm³)

Substituting the values in the density formula;

Density = 1.17/0.33

Density = 3.54 g/cm³

As, diamond has a density that ranges between 3.5 & 3.54 g/cm3. As a result, the above rock is indeed a diamond.

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The correct question is-

If a rock sample has a mass of 1.17 g and a volume of 0.33 cm3, what type of rock is it?