Question

The density of copper is 8.94 g/cm 3 at 20°C and 8.91 g/cm 3 at 60°C. This density decrease is the result of which of the following? State by inserting T for True or F for false with a possible explanation for each of the following statements. (a) The metal expands. (b) The metal contracts. (c) The mass of the metal increases. (d) The mass of the metal decreases.​

Answer 1

The true statement is that the metal expands, causing increase in volume which consequently causes the density to decrease slightly.

The density of a substance depends on its mass and its volume. Copper is a metallic substance. We usually define the density of a substance as the ratio of mass to volume.

This means that, as the volume of a substance increases or decreases, the density of the substance is affected.

Having said that, we need to be reminded that the mass of the substance does not change when the metal is heated but the metal may increase in volume (expand) when heated or decrease in volume(contract) when cooled.

When a metal expands, its density decreases. As we can see, the density of copper decreased from 8.94 g/cm 3 at 20°C to 8.91 g/cm 3 at 60°C.

So, the following are true or false;

The metal expands - True

The metal contracts - False

The mass of the metal increases - False

The mass of the metal decreases - False

Learn more: brainly.com/question/6034174