Question

Density is a physical property of a molecule that’s measured as mass per unit volume. Given that density is usually expressed in the units of g/cm3, calculate the density of a cube of plastic that has a mass of 2.331 g and an edge length of 1.500 cm (volume of a cube is V = l3). Be sure to show all steps in the process and include units throughout the problem.

Answer 1

Mass of cube = 2.331 g

Edge length of cube = 1.500 cm

Volume of cube= $l^3$

Volume =$(1.500)^3$ cm³

Volume = 1.500×1.500×1.500= 3.375 cm³

$Density=\frac{mass}{volume}= \frac{2.331}{3.375}=$ 0.691 $\frac{g}{cm^3}$