Question

The table provided the densities of four transparent materials a student has a clear block of an unknown substance and need to determine the identity of the substance the mass of the block is 23.9 grams the block displaces 8.8 ml water when dropped in a graduated cylinder what is the identity for f the substance?

Substance Density
Polyethylene 0.85 g/ml
Lucite 1.2 g/ml
Glass 2.3 g/ml
Quartz 2.7 g/ml

a. polyethylene
b. lucite
c. glass
d. quartz

Answer 1

The f substance is quartz. Hence the correct option is d.

To determine the identity of the unknown substance, we can use the density formula, which is density = mass/volume. In this case, the mass of the clear block is given as 23.9 grams, and the volume is determined by the water displacement method, yielding 8.8 ml.

Using the density formula, we can calculate the density of the unknown substance:

Density = mass/volume

Density = 23.9 grams / 8.8 ml

Density ≈ 2.72 g/ml

Comparing this calculated density with the provided densities for different substances, the closest match is quartz, which has a density of 2.7 g/ml. Therefore, based on the calculated density, the identity of the unknown substance is most likely quartz. Hence the correct option is d.