Question

What is the density at 20oC of 12.0 milliliters of a liquid that has a mass of 4.05 grams?

(if you don't know don't answer it please)

Answer 1

Density is defined as mass per unit volume:

density = mass/volume

Density can be calculated using the mathematical formula (expression):

d = m ÷ V

where d = density, m = mass, V = volume

The greater the density, the more mass per unit volume.

The unit of density derived from SI units is kilograms per cubic meter, kg/m3 or kg m-3.

More commonly, densities are given in g/mL (g mL-1) or g/cm3 (g cm-3 or g/cc).

Density is a characteristic property of pure substances so density can help identify a particular pure substance.

Since different substances have different densities, density can also be used to separate one substance from another.

In general, solids are more dense than liquids which are more dense than gases:

density of solid > density of liquid > density of gas

Step-by-step

Answer 2

0.338 g/mL

Explanation:

Density is the mass per unit volume of any object. It is calculated by dividing the mass of an object by its volume. This is:

ρ = m/V

ρ = 4.05 g / 12 mL

ρ = 0.3375 g/mL

ρ ≅ 0.338 g/mL