Maria examines a mixture that appears to be the same throughout. however, when she looks at a sample using a magnifying lens, she can see small droplets of liquid surrounded by another liquid. which conclusion best fits her observations?

The mixture is a colloid because two different substances can be seen in a small sample when observed under a microscope.

Option D

Explanation:

Colloid is a heterogeneous mixture of two or more substances with relatively smaller size of solute particles and thus it appears to be a homogeneous mixture.

Particles present in a colloidal solution cannot be differentiated through naked eye observations and hence when Maria examined the sample under a microscope, two different substances were seen. Maria saw the mixture to be same throughout since the solute particles were very small in size and evenly dispersed in the solvent.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3