What mass does a cube of a substance with a density of 7 g / cm3 have? The surface area of the cube is 24 cm2.

Let us determine what value the area of one face of a given cube will equal, if from the condition of our problem we know for sure that its surface area is 24 cm2:

24: 6 = 4.

Let us determine what value in this case will be equal to the length of one edge of the specified cube:

a = √4 = 2.

Let’s determine what value in this case the volume of the specified cube will be equal to:

2 ^ 3 = 8.

Let us determine what value in this case the mass of the indicated cube will be equal to:

m = V * p;

m = 8 * 7 = 56.

Answer: 56 g.