Answer:
Explanation: To find the mass of a cube of aluminum, we can use the formula:
Mass = Density x Volume
First, let's find the volume of the cube. The volume of a cube is calculated by multiplying the length of one side (also called the edge length) by itself twice. In this case, the edge length is given as 3.0 cm.
Volume of the cube = (3.0 cm)^3 = 27 cm³
Now, we can use the density of aluminum, which is given as 2.7 g/cm³, and the volume we just calculated to find the mass.
Mass = Density x Volume
Mass = 2.7 g/cm³ x 27 cm³
The units of cm³ will cancel out, leaving us with the mass in grams:
Mass = 2.7 g/cm³ x 27 cm³ = 72.9 g
Therefore, the mass of the cube of aluminum with a 3.0 cm edge length is 72.9 grams. :)