Question

If a piece of metal has a density of 2.7 g/cm³ and a mass of 21.0 g, find its volume? Round it.

A) 7.8 cm³
B) 15.6 cm³
C) 5.0 cm³
D) 27.7 cm³

Answer 1

The volume of the metal is calculated using the formula: Volume = Mass / Density. With a mass of 21.0 g and a density of 2.7 g/cm³, the volume comes out to be 7.777... cm³, which rounds to 7.8 cm³, making option A) the correct answer.

Step-by-step explanation:

To find the volume of the metal, we use the formula: Volume = Mass / Density. Given that the density of the metal is 2.7 g/cm³ and the mass is 21.0 g, the volume would be:

Volume = Mass / Density = 21.0 g / 2.7 g/cm³ = 7.777... cm³

When rounded to the nearest tenth, this gives us a volume of approximately 7.8 cm³, which corresponds to option A).